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Theorem List for Metamath Proof Explorer - 37901-38000   *Has distinct variable group(s)
TypeLabelDescription
Statement

Theoremcdlemg16 37901 Part of proof of Lemma G of [Crawley] p. 116; 2nd line p. 117, which says that (our) cdlemg10 37885 "implies (2)" (of p. 116). No details are provided by the authors, so there may be a shorter proof; but ours requires the 14 lemmas, one using Desargues's law dalaw 37130, in order to make this inference. This final step eliminates the (𝑅𝐹) ≠ (𝑅𝐺) condition from cdlemg12 37894. TODO: FIX COMMENT. TODO: should we also eliminate 𝑃𝑄 here (or earlier)? Do it if we don't need to add it in for something else later. (Contributed by NM, 6-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ (¬ (𝑅𝐹) (𝑃 𝑄) ∧ ¬ (𝑅𝐺) (𝑃 𝑄) ∧ ((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg16ALTN 37902 This version of cdlemg16 37901 uses cdlemg15a 37899 instead of cdlemg15 37900, in case cdlemg15 37900 ends up not being needed. TODO: FIX COMMENT. (Contributed by NM, 6-May-2013.) (New usage is discouraged.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻 ∧ (𝐹𝑇𝐺𝑇)) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ 𝑃𝑄) ∧ (((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) ∧ ¬ (𝑅𝐹) (𝑃 𝑄) ∧ ¬ (𝑅𝐺) (𝑃 𝑄))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg16z 37903 Eliminate ((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) condition from cdlemg16 37901. TODO: would it help to also eliminate 𝑃𝑄 here or later? (Contributed by NM, 25-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ (¬ (𝑅𝐹) (𝑃 𝑄) ∧ ¬ (𝑅𝐺) (𝑃 𝑄))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg16zz 37904 Eliminate 𝑃𝑄 from cdlemg16z 37903. TODO: Use this only if needed. (Contributed by NM, 26-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ 𝐹𝑇) ∧ (𝐺𝑇 ∧ ¬ (𝑅𝐹) (𝑃 𝑄) ∧ ¬ (𝑅𝐺) (𝑃 𝑄))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg17a 37905 TODO: FIX COMMENT. (Contributed by NM, 8-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐺𝑇 ∧ (𝑅𝐺) (𝑃 𝑄))) → (𝐺𝑃) (𝑃 𝑄))

Theoremcdlemg17b 37906* Part of proof of Lemma G in [Crawley] p. 117, 4th line. Whenever (in their terminology) p q/0 (i.e. the sublattice from 0 to p q) contains precisely three atoms and g is not the identity, g(p) = q. See also comments under cdleme0nex 37534. (Contributed by NM, 8-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝐺𝑃) = 𝑄)

Theoremcdlemg17dN 37907* TODO: fix comment. (Contributed by NM, 9-May-2013.) (New usage is discouraged.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻𝐺𝑇) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ 𝑃𝑄) ∧ ((𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)) ∧ (𝐺𝑃) ≠ 𝑃)) → (𝑅𝐺) = ((𝑃 𝑄) 𝑊))

Theoremcdlemg17dALTN 37908 Same as cdlemg17dN 37907 with fewer antecedents but longer proof TODO: fix comment. (Contributed by NM, 9-May-2013.) (New usage is discouraged.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻𝐺𝑇) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ 𝑄𝐴𝑃𝑄) ∧ ((𝑅𝐺) (𝑃 𝑄) ∧ (𝐺𝑃) ≠ 𝑃)) → (𝑅𝐺) = ((𝑃 𝑄) 𝑊))

Theoremcdlemg17e 37909* TODO: fix comment. (Contributed by NM, 8-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝐹𝑃) (𝐹𝑄)) = ((𝐹𝑃) (𝑅𝐺)))

Theoremcdlemg17f 37910* TODO: fix comment. (Contributed by NM, 8-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝐹𝑃) (𝐹𝑄)) = ((𝐹𝑃) (𝐺‘(𝐹𝑃))))

Theoremcdlemg17g 37911* TODO: fix comment. (Contributed by NM, 9-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝐺‘(𝐹𝑃)) ((𝐹𝑃) (𝐹𝑄)))

Theoremcdlemg17h 37912* TODO: fix comment. (Contributed by NM, 10-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑆𝐴 ∧ ¬ 𝑆 𝑊) ∧ (𝐹𝑇𝐺𝑇) ∧ (𝑃𝑄𝑆 ((𝐹𝑃) (𝐹𝑄)))) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝑆 = (𝐹𝑃) ∨ 𝑆 = (𝐹𝑄)))

Theoremcdlemg17i 37913* TODO: fix comment. (Contributed by NM, 10-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝐺‘(𝐹𝑃)) = (𝐹𝑄))

Theoremcdlemg17ir 37914* TODO: fix comment. (Contributed by NM, 13-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝐹‘(𝐺𝑃)) = (𝐹𝑄))

Theoremcdlemg17j 37915* TODO: fix comment. (Contributed by NM, 11-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝐺‘(𝐹𝑃)) = (𝐹‘(𝐺𝑃)))

Theoremcdlemg17pq 37916* Utility theorem for swapping 𝑃 and 𝑄. TODO: fix comment. (Contributed by NM, 11-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑄𝑃) ∧ ((𝐺𝑄) ≠ 𝑄 ∧ (𝑅𝐺) (𝑄 𝑃) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑄 𝑟) = (𝑃 𝑟)))))

Theoremcdlemg17bq 37917* cdlemg17b 37906 with 𝑃 and 𝑄 swapped. Antecedent 𝐹 ∈ (𝑇𝑊) is redundant for easier use. TODO: should we have redundant antecedent for cdlemg17b 37906 also? (Contributed by NM, 13-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝐺𝑄) = 𝑃)

Theoremcdlemg17iqN 37918* cdlemg17i 37913 with 𝑃 and 𝑄 swapped. (Contributed by NM, 13-May-2013.) (New usage is discouraged.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻 ∧ (𝐹𝑇𝐺𝑇)) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ 𝑃𝑄) ∧ ((𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)) ∧ (𝐺𝑃) ≠ 𝑃)) → (𝐺‘(𝐹𝑄)) = (𝐹𝑃))

Theoremcdlemg17irq 37919* cdlemg17ir 37914 with 𝑃 and 𝑄 swapped. (Contributed by NM, 13-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝐹‘(𝐺𝑄)) = (𝐹𝑃))

Theoremcdlemg17jq 37920* cdlemg17j 37915 with 𝑃 and 𝑄 swapped. (Contributed by NM, 13-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝐺‘(𝐹𝑄)) = (𝐹‘(𝐺𝑄)))

Theoremcdlemg17 37921* Part of Lemma G of [Crawley] p. 117, lines 7 and 8. We show an argument whose value at 𝐺 equals itself. TODO: fix comment. (Contributed by NM, 12-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐺) (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → (𝐺‘((𝑃 (𝐹‘(𝐺𝑃))) (𝑄 (𝐹‘(𝐺𝑄))))) = ((𝑃 (𝐹‘(𝐺𝑃))) (𝑄 (𝐹‘(𝐺𝑄)))))

Theoremcdlemg18a 37922 Show two lines are different. TODO: fix comment. (Contributed by NM, 14-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴𝑄𝐴𝐹𝑇) ∧ (𝑃𝑄 ∧ ((𝐹𝑄) (𝐹𝑃)) ≠ (𝑃 𝑄))) → (𝑃 (𝐹𝑄)) ≠ (𝑄 (𝐹𝑃)))

Theoremcdlemg18b 37923 Lemma for cdlemg18c 37924. TODO: fix comment. (Contributed by NM, 15-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑈 = ((𝑃 𝑄) 𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ 𝐹𝑇) ∧ (𝑃𝑄 ∧ (𝐹𝑃) ≠ 𝑄 ∧ ((𝐹𝑄) (𝐹𝑃)) ≠ (𝑃 𝑄))) → ¬ 𝑃 (𝑈 (𝐹𝑄)))

Theoremcdlemg18c 37924 Show two lines intersect at an atom. TODO: fix comment. (Contributed by NM, 15-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑈 = ((𝑃 𝑄) 𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ 𝐹𝑇) ∧ (𝑃𝑄 ∧ (𝐹𝑃) ≠ 𝑄 ∧ ((𝐹𝑄) (𝐹𝑃)) ≠ (𝑃 𝑄))) → ((𝑃 (𝐹𝑄)) (𝑄 (𝐹𝑃))) ∈ 𝐴)

Theoremcdlemg18d 37925* Show two lines intersect at an atom. TODO: fix comment. (Contributed by NM, 15-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝐹𝑇𝐺𝑇) ∧ 𝑃𝑄 ∧ (𝐺𝑃) ≠ 𝑃) ∧ ((𝑅𝐺) (𝑃 𝑄) ∧ ((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) (𝑄 (𝐹‘(𝐺𝑄)))) ∈ 𝐴)

Theoremcdlemg18 37926* Show two lines intersect at an atom. TODO: fix comment. (Contributed by NM, 15-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝐹𝑇𝐺𝑇) ∧ 𝑃𝑄 ∧ (𝐺𝑃) ≠ 𝑃) ∧ ((𝑅𝐺) (𝑃 𝑄) ∧ ((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) (𝑄 (𝐹‘(𝐺𝑄)))) 𝑊)

Theoremcdlemg19a 37927* Show two lines intersect at an atom. TODO: fix comment. (Contributed by NM, 15-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝐹𝑇𝐺𝑇) ∧ 𝑃𝑄 ∧ (𝐺𝑃) ≠ 𝑃) ∧ ((𝑅𝐺) (𝑃 𝑄) ∧ ((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) (𝑄 (𝐹‘(𝐺𝑄)))) = ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊))

Theoremcdlemg19 37928* Show two lines intersect at an atom. TODO: fix comment. (Contributed by NM, 15-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝐹𝑇𝐺𝑇) ∧ 𝑃𝑄 ∧ (𝐺𝑃) ≠ 𝑃) ∧ ((𝑅𝐺) (𝑃 𝑄) ∧ ((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg20 37929* Show two lines intersect at an atom. TODO: fix comment. (Contributed by NM, 23-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝑅𝐺) (𝑃 𝑄) ∧ ((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg21 37930* Version of cdlemg19 with (𝑅𝐹) (𝑃 𝑄) instead of (𝑅𝐺) (𝑃 𝑄) as a condition. (Contributed by NM, 23-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝐹𝑇𝐺𝑇) ∧ 𝑃𝑄 ∧ (𝐹𝑃) ≠ 𝑃) ∧ ((𝑅𝐹) (𝑃 𝑄) ∧ ((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg22 37931* cdlemg21 37930 with (𝐹𝑃) ≠ 𝑃 condition removed. (Contributed by NM, 23-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ ((𝑅𝐹) (𝑃 𝑄) ∧ ((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg24 37932* Combine cdlemg16z 37903 and cdlemg22 37931. TODO: Fix comment. (Contributed by NM, 24-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ (((𝐹‘(𝐺𝑃)) (𝐹‘(𝐺𝑄))) ≠ (𝑃 𝑄) ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg37 37933* Use cdlemg8 37875 to eliminate the ≠ (𝑃 𝑄) condition of cdlemg24 37932. (Contributed by NM, 31-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ 𝐹𝑇) ∧ (𝐺𝑇𝑃𝑄 ∧ ¬ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg25zz 37934 cdlemg16zz 37904 restated for easier studying. TODO: Discard this after everything is figured out. (Contributed by NM, 26-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑧𝐴 ∧ ¬ 𝑧 𝑊) ∧ 𝐹𝑇) ∧ (𝐺𝑇 ∧ ¬ (𝑅𝐹) (𝑃 𝑧) ∧ ¬ (𝑅𝐺) (𝑃 𝑧))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑧 (𝐹‘(𝐺𝑧))) 𝑊))

Theoremcdlemg26zz 37935 cdlemg16zz 37904 restated for easier studying. TODO: Discard this after everything is figured out. (Contributed by NM, 26-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ (𝑧𝐴 ∧ ¬ 𝑧 𝑊) ∧ 𝐹𝑇) ∧ (𝐺𝑇 ∧ ¬ (𝑅𝐹) (𝑄 𝑧) ∧ ¬ (𝑅𝐺) (𝑄 𝑧))) → ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊) = ((𝑧 (𝐹‘(𝐺𝑧))) 𝑊))

Theoremcdlemg27a 37936 For use with case when (𝑃 𝑣) (𝑄 (𝑅𝐹)) or (𝑃 𝑣) (𝑄 (𝑅𝐹)) is zero, letting us establish ¬ 𝑧 𝑊𝑧 (𝑃 𝑣) via 4atex 37320. TODO: Fix comment. (Contributed by NM, 28-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑣𝐴𝑣 𝑊)) ∧ (𝑧𝐴𝐹𝑇) ∧ (𝑣 ≠ (𝑅𝐹) ∧ 𝑧 (𝑃 𝑣) ∧ (𝐹𝑃) ≠ 𝑃)) → ¬ (𝑅𝐹) (𝑃 𝑧))

Theoremcdlemg28a 37937 Part of proof of Lemma G of [Crawley] p. 116. First equality of the equation of line 14 on p. 117. (Contributed by NM, 29-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑣𝐴𝑣 𝑊)) ∧ ((𝑧𝐴 ∧ ¬ 𝑧 𝑊) ∧ 𝐹𝑇𝐺𝑇) ∧ ((𝑣 ≠ (𝑅𝐹) ∧ 𝑣 ≠ (𝑅𝐺)) ∧ 𝑧 (𝑃 𝑣) ∧ ((𝐹𝑃) ≠ 𝑃 ∧ (𝐺𝑃) ≠ 𝑃))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑧 (𝐹‘(𝐺𝑧))) 𝑊))

Theoremcdlemg31b0N 37938 TODO: Fix comment. (Contributed by NM, 30-May-2013.) (New usage is discouraged.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))       (((𝐾 ∈ HL ∧ 𝑊𝐻𝐹𝑇) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ 𝑣 ≠ (𝑅𝐹) ∧ (𝐹𝑃) ≠ 𝑃)) → (𝑁𝐴𝑁 = (0.‘𝐾)))

Theoremcdlemg31b0a 37939 TODO: Fix comment. (Contributed by NM, 30-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ (𝑣𝐴𝑣 𝑊)) ∧ (𝐹𝑇𝑣 ≠ (𝑅𝐹))) → (𝑁𝐴𝑁 = (0.‘𝐾)))

Theoremcdlemg27b 37940 TODO: Fix comment. (Contributed by NM, 28-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝑧𝐴 ∧ (𝑣𝐴𝑣 𝑊) ∧ (𝐹𝑇𝑧𝑁)) ∧ (𝑣 ≠ (𝑅𝐹) ∧ 𝑧 (𝑃 𝑣) ∧ (𝐹𝑃) ≠ 𝑃)) → ¬ (𝑅𝐹) (𝑄 𝑧))

Theoremcdlemg31a 37941 TODO: fix comment. (Contributed by NM, 29-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴𝑄𝐴) ∧ (𝑣𝐴𝐹𝑇)) → 𝑁 (𝑃 𝑣))

Theoremcdlemg31b 37942 TODO: fix comment. (Contributed by NM, 29-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴𝑄𝐴) ∧ (𝑣𝐴𝐹𝑇)) → 𝑁 (𝑄 (𝑅𝐹)))

Theoremcdlemg31c 37943 Show that when 𝑁 is an atom, it is not under 𝑊. TODO: Is there a shorter direct proof? TODO: should we eliminate (𝐹𝑃) ≠ 𝑃 here? (Contributed by NM, 29-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ 𝐹𝑇) ∧ (𝑣 ≠ (𝑅𝐹) ∧ (𝐹𝑃) ≠ 𝑃𝑁𝐴)) → ¬ 𝑁 𝑊)

Theoremcdlemg31d 37944 Eliminate (𝐹𝑃) ≠ 𝑃 from cdlemg31c 37943. TODO: Prove directly. TODO: do we need to eliminate (𝐹𝑃) ≠ 𝑃? It might be better to do this all at once at the end. See also cdlemg29 37949 versus cdlemg28 37948. (Contributed by NM, 29-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊) ∧ (𝑣𝐴𝑣 𝑊)) ∧ (𝐹𝑇𝑣 ≠ (𝑅𝐹) ∧ 𝑁𝐴)) → ¬ 𝑁 𝑊)

Theoremcdlemg33b0 37945* TODO: Fix comment. (Contributed by NM, 30-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ 𝑁𝐴𝐹𝑇) ∧ (𝑃𝑄𝑣 ≠ (𝑅𝐹) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ∃𝑧𝐴𝑧 𝑊 ∧ (𝑧𝑁𝑧 (𝑃 𝑣))))

Theoremcdlemg33c0 37946* TODO: Fix comment. (Contributed by NM, 30-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ 𝐹𝑇) ∧ (𝑃𝑄𝑣 ≠ (𝑅𝐹) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ∃𝑧𝐴𝑧 𝑊𝑧 (𝑃 𝑣)))

Theoremcdlemg28b 37947* Part of proof of Lemma G of [Crawley] p. 116. Second equality of the equation of line 14 on p. 117. Note that ¬ 𝑧 𝑊 is redundant here (but simplifies cdlemg28 37948.) (Contributed by NM, 29-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝑧𝐴 ∧ ¬ 𝑧 𝑊) ∧ (𝐹𝑇𝐺𝑇)) ∧ ((𝑧𝑁𝑧𝑂𝑧 (𝑃 𝑣)) ∧ (𝑣 ≠ (𝑅𝐹) ∧ 𝑣 ≠ (𝑅𝐺)) ∧ ((𝐹𝑃) ≠ 𝑃 ∧ (𝐺𝑃) ≠ 𝑃))) → ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊) = ((𝑧 (𝐹‘(𝐺𝑧))) 𝑊))

Theoremcdlemg28 37948* Part of proof of Lemma G of [Crawley] p. 116. Chain the equalities of line 14 on p. 117. TODO: rearrange hypotheses in the order of cdlemg29 37949 (and maybe leading up to this too)? (Contributed by NM, 29-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝑧𝐴 ∧ ¬ 𝑧 𝑊) ∧ (𝐹𝑇𝐺𝑇)) ∧ ((𝑧𝑁𝑧𝑂𝑧 (𝑃 𝑣)) ∧ (𝑣 ≠ (𝑅𝐹) ∧ 𝑣 ≠ (𝑅𝐺)) ∧ ((𝐹𝑃) ≠ 𝑃 ∧ (𝐺𝑃) ≠ 𝑃))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg29 37949* Eliminate (𝐹𝑃) ≠ 𝑃 and (𝐺𝑃) ≠ 𝑃 from cdlemg28 37948. TODO: would it be better to do this later? (Contributed by NM, 29-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝑧𝐴 ∧ ¬ 𝑧 𝑊) ∧ (𝐹𝑇𝐺𝑇)) ∧ ((𝑧𝑁𝑧𝑂) ∧ 𝑧 (𝑃 𝑣) ∧ (𝑣 ≠ (𝑅𝐹) ∧ 𝑣 ≠ (𝑅𝐺)))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg33a 37950* TODO: Fix comment. (Contributed by NM, 29-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝑁𝐴𝑂𝐴) ∧ (𝐹𝑇𝐺𝑇)) ∧ ((𝑃𝑄𝑁𝑂) ∧ 𝑣 ≠ (𝑅𝐹) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ∃𝑧𝐴𝑧 𝑊 ∧ (𝑧𝑁𝑧𝑂𝑧 (𝑃 𝑣))))

Theoremcdlemg33b 37951* TODO: Fix comment. (Contributed by NM, 30-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝑁𝐴𝑂𝐴) ∧ (𝐹𝑇𝐺𝑇)) ∧ (𝑃𝑄𝑣 ≠ (𝑅𝐹) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ∃𝑧𝐴𝑧 𝑊 ∧ (𝑧𝑁𝑧𝑂𝑧 (𝑃 𝑣))))

Theoremcdlemg33c 37952* TODO: Fix comment. (Contributed by NM, 30-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝑁𝐴𝑂 = (0.‘𝐾)) ∧ (𝐹𝑇𝐺𝑇)) ∧ (𝑃𝑄𝑣 ≠ (𝑅𝐹) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ∃𝑧𝐴𝑧 𝑊 ∧ (𝑧𝑁𝑧𝑂𝑧 (𝑃 𝑣))))

Theoremcdlemg33d 37953* TODO: Fix comment. (Contributed by NM, 30-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝑁 = (0.‘𝐾) ∧ 𝑂𝐴) ∧ (𝐹𝑇𝐺𝑇)) ∧ (𝑃𝑄𝑣 ≠ (𝑅𝐺) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ∃𝑧𝐴𝑧 𝑊 ∧ (𝑧𝑁𝑧𝑂𝑧 (𝑃 𝑣))))

Theoremcdlemg33e 37954* TODO: Fix comment. (Contributed by NM, 30-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝑁 = (0.‘𝐾) ∧ 𝑂 = (0.‘𝐾)) ∧ (𝐹𝑇𝐺𝑇)) ∧ (𝑃𝑄𝑣 ≠ (𝑅𝐹) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ∃𝑧𝐴𝑧 𝑊 ∧ (𝑧𝑁𝑧𝑂𝑧 (𝑃 𝑣))))

Theoremcdlemg33 37955* Combine cdlemg33b 37951, cdlemg33c 37952, cdlemg33d 37953, cdlemg33e 37954. TODO: Fix comment. (Contributed by NM, 30-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝐹𝑇𝐺𝑇) ∧ 𝑃𝑄) ∧ (𝑣 ≠ (𝑅𝐹) ∧ 𝑣 ≠ (𝑅𝐺) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ∃𝑧𝐴𝑧 𝑊 ∧ (𝑧𝑁𝑧𝑂𝑧 (𝑃 𝑣))))

Theoremcdlemg34 37956* Use cdlemg33 to eliminate 𝑧 from cdlemg29 37949. TODO: Fix comment. (Contributed by NM, 31-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &   𝑁 = ((𝑃 𝑣) (𝑄 (𝑅𝐹)))    &   𝑂 = ((𝑃 𝑣) (𝑄 (𝑅𝐺)))       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ ((𝑣𝐴𝑣 𝑊) ∧ (𝐹𝑇𝐺𝑇) ∧ 𝑃𝑄) ∧ (𝑣 ≠ (𝑅𝐹) ∧ 𝑣 ≠ (𝑅𝐺) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg35 37957* TODO: Fix comment. TODO: should we have a more general version of hlsupr 36630 to avoid the conditions? (Contributed by NM, 31-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ 𝐹𝑇𝐺𝑇) ∧ ((𝐹𝑃) ≠ 𝑃 ∧ (𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐹) ≠ (𝑅𝐺))) → ∃𝑣𝐴 (𝑣 𝑊 ∧ (𝑣 ≠ (𝑅𝐹) ∧ 𝑣 ≠ (𝑅𝐺))))

Theoremcdlemg36 37958* Use cdlemg35 to eliminate 𝑣 from cdlemg34 37956. TODO: Fix comment. (Contributed by NM, 31-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ (((𝐹𝑃) ≠ 𝑃 ∧ (𝐺𝑃) ≠ 𝑃) ∧ (𝑅𝐹) ≠ (𝑅𝐺) ∧ ∃𝑟𝐴𝑟 𝑊 ∧ (𝑃 𝑟) = (𝑄 𝑟)))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg38 37959 Use cdlemg37 37933 to eliminate 𝑟𝐴 from cdlemg36 37958. TODO: Fix comment. (Contributed by NM, 31-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄) ∧ (((𝐹𝑃) ≠ 𝑃 ∧ (𝐺𝑃) ≠ 𝑃) ∧ (𝑅𝐹) ≠ (𝑅𝐺))) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg39 37960 Eliminate conditions from cdlemg38 37959. TODO: Would this better be done at cdlemg35 37957? TODO: Fix comment. (Contributed by NM, 31-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇𝑃𝑄)) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg40 37961 Eliminate 𝑃𝑄 conditions from cdlemg39 37960. TODO: Fix comment. (Contributed by NM, 31-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇)) → ((𝑃 (𝐹‘(𝐺𝑃))) 𝑊) = ((𝑄 (𝐹‘(𝐺𝑄))) 𝑊))

Theoremcdlemg41 37962 Convert cdlemg40 37961 to function composition. TODO: Fix comment. (Contributed by NM, 31-May-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝑄𝐴 ∧ ¬ 𝑄 𝑊)) ∧ (𝐹𝑇𝐺𝑇)) → ((𝑃 ((𝐹𝐺)‘𝑃)) 𝑊) = ((𝑄 ((𝐹𝐺)‘𝑄)) 𝑊))

Theoremltrnco 37963 The composition of two translations is a translation. Part of proof of Lemma G of [Crawley] p. 116, line 15 on p. 117. (Contributed by NM, 31-May-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ 𝐹𝑇𝐺𝑇) → (𝐹𝐺) ∈ 𝑇)

Theoremtrlcocnv 37964 Swap the arguments of the trace of a composition with converse. (Contributed by NM, 1-Jul-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ 𝐹𝑇𝐺𝑇) → (𝑅‘(𝐹𝐺)) = (𝑅‘(𝐺𝐹)))

Theoremtrlcoabs 37965 Absorption into a composition by joining with trace. (Contributed by NM, 22-Jul-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊)) → (((𝐹𝐺)‘𝑃) (𝑅𝐹)) = ((𝐺𝑃) (𝑅𝐹)))

Theoremtrlcoabs2N 37966 Absorption of the trace of a composition. (Contributed by NM, 29-Jul-2013.) (New usage is discouraged.)
= (le‘𝐾)    &    = (join‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊)) → ((𝐹𝑃) (𝑅‘(𝐺𝐹))) = ((𝐹𝑃) (𝐺𝑃)))

Theoremtrlcoat 37967 The trace of a composition of two translations is an atom if their traces are different. (Contributed by NM, 15-Jun-2013.)
𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ (𝑅𝐹) ≠ (𝑅𝐺)) → (𝑅‘(𝐹𝐺)) ∈ 𝐴)

Theoremtrlcocnvat 37968 Commonly used special case of trlcoat 37967. (Contributed by NM, 1-Jul-2013.)
𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ (𝑅𝐹) ≠ (𝑅𝐺)) → (𝑅‘(𝐹𝐺)) ∈ 𝐴)

Theoremtrlconid 37969 The composition of two different translations is not the identity translation. (Contributed by NM, 22-Jul-2013.)
𝐵 = (Base‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ (𝑅𝐹) ≠ (𝑅𝐺)) → (𝐹𝐺) ≠ ( I ↾ 𝐵))

Theoremtrlcolem 37970 Lemma for trlco 37971. (Contributed by NM, 1-Jun-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &    = (meet‘𝐾)    &   𝐴 = (Atoms‘𝐾)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊)) → (𝑅‘(𝐹𝐺)) ((𝑅𝐹) (𝑅𝐺)))

Theoremtrlco 37971 The trace of a composition of translations is less than or equal to the join of their traces. Part of proof of Lemma G of [Crawley] p. 116, second paragraph on p. 117. (Contributed by NM, 2-Jun-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ 𝐹𝑇𝐺𝑇) → (𝑅‘(𝐹𝐺)) ((𝑅𝐹) (𝑅𝐺)))

Theoremtrlcone 37972 If two translations have different traces, the trace of their composition is also different. (Contributed by NM, 14-Jun-2013.)
𝐵 = (Base‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ ((𝑅𝐹) ≠ (𝑅𝐺) ∧ 𝐺 ≠ ( I ↾ 𝐵))) → (𝑅𝐹) ≠ (𝑅‘(𝐹𝐺)))

Theoremcdlemg42 37973 Part of proof of Lemma G of [Crawley] p. 116, first line of third paragraph on p. 117. (Contributed by NM, 3-Jun-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐹) ≠ (𝑅𝐺))) → ¬ (𝐺𝑃) (𝑃 (𝐹𝑃)))

Theoremcdlemg43 37974 Part of proof of Lemma G of [Crawley] p. 116, third line of third paragraph on p. 117. (Contributed by NM, 3-Jun-2013.)
= (le‘𝐾)    &    = (join‘𝐾)    &   𝐴 = (Atoms‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &    = (meet‘𝐾)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ ((𝑃𝐴 ∧ ¬ 𝑃 𝑊) ∧ (𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐹) ≠ (𝑅𝐺))) → (𝐹‘(𝐺𝑃)) = (((𝐺𝑃) (𝑅𝐹)) ((𝐹𝑃) (𝑅𝐺))))

Theoremcdlemg44a 37975 Part of proof of Lemma G of [Crawley] p. 116, fourth line of third paragraph on p. 117: "so fg(p) = gf(p)." (Contributed by NM, 3-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &    = (le‘𝐾)    &   𝐴 = (Atoms‘𝐾)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇 ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊)) ∧ ((𝐹𝑃) ≠ 𝑃 ∧ (𝐺𝑃) ≠ 𝑃 ∧ (𝑅𝐹) ≠ (𝑅𝐺))) → (𝐹‘(𝐺𝑃)) = (𝐺‘(𝐹𝑃)))

Theoremcdlemg44b 37976 Eliminate (𝐹𝑃) ≠ 𝑃, (𝐺𝑃) ≠ 𝑃 from cdlemg44a 37975. (Contributed by NM, 3-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)    &    = (le‘𝐾)    &   𝐴 = (Atoms‘𝐾)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇 ∧ (𝑃𝐴 ∧ ¬ 𝑃 𝑊)) ∧ (𝑅𝐹) ≠ (𝑅𝐺)) → (𝐹‘(𝐺𝑃)) = (𝐺‘(𝐹𝑃)))

Theoremcdlemg44 37977 Part of proof of Lemma G of [Crawley] p. 116, fifth line of third paragraph on p. 117: "and hence fg = gf." (Contributed by NM, 3-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ (𝑅𝐹) ≠ (𝑅𝐺)) → (𝐹𝐺) = (𝐺𝐹))

Theoremcdlemg47a 37978 TODO: fix comment. TODO: Use this above in place of (𝐹𝑃) = 𝑃 antecedents? (Contributed by NM, 5-Jun-2013.)
𝐵 = (Base‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ 𝐹 = ( I ↾ 𝐵)) → (𝐹𝐺) = (𝐺𝐹))

Theoremcdlemg46 37979* Part of proof of Lemma G of [Crawley] p. 116, seventh line of third paragraph on p. 117: "hf and f have different traces." (Contributed by NM, 5-Jun-2013.)
𝐵 = (Base‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝑇) ∧ (𝐹 ≠ ( I ↾ 𝐵) ∧ ≠ ( I ↾ 𝐵) ∧ (𝑅) ≠ (𝑅𝐹))) → (𝑅‘(𝐹)) ≠ (𝑅𝐹))

Theoremcdlemg47 37980* Part of proof of Lemma G of [Crawley] p. 116, ninth line of third paragraph on p. 117: "we conclude that gf = fg." (Contributed by NM, 5-Jun-2013.)
𝐵 = (Base‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       ((((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ 𝐹𝑇𝐺𝑇) ∧ (𝑇 ∧ (𝑅𝐹) = (𝑅𝐺)) ∧ (𝐹 ≠ ( I ↾ 𝐵) ∧ ≠ ( I ↾ 𝐵) ∧ (𝑅) ≠ (𝑅𝐹))) → (𝐹𝐺) = (𝐺𝐹))

Theoremcdlemg48 37981 Eliminate from cdlemg47 37980. (Contributed by NM, 5-Jun-2013.)
𝐵 = (Base‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ (𝐹𝑇𝐺𝑇) ∧ (𝐹 ≠ ( I ↾ 𝐵) ∧ (𝑅𝐹) = (𝑅𝐺))) → (𝐹𝐺) = (𝐺𝐹))

Theoremltrncom 37982 Composition is commutative for translations. Part of proof of Lemma G of [Crawley] p. 116. (Contributed by NM, 5-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ 𝐹𝑇𝐺𝑇) → (𝐹𝐺) = (𝐺𝐹))

Theoremltrnco4 37983 Rearrange a composition of 4 translations, analogous to an4 655. (Contributed by NM, 10-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ 𝐸𝑇𝐹𝑇) → ((𝐷𝐸) ∘ (𝐹𝐺)) = ((𝐷𝐹) ∘ (𝐸𝐺)))

Theoremtrljco 37984 Trace joined with trace of composition. (Contributed by NM, 15-Jun-2013.)
= (join‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ 𝐹𝑇𝐺𝑇) → ((𝑅𝐹) (𝑅‘(𝐹𝐺))) = ((𝑅𝐹) (𝑅𝐺)))

Theoremtrljco2 37985 Trace joined with trace of composition. (Contributed by NM, 16-Jun-2013.)
= (join‘𝐾)    &   𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝑅 = ((trL‘𝐾)‘𝑊)       (((𝐾 ∈ HL ∧ 𝑊𝐻) ∧ 𝐹𝑇𝐺𝑇) → ((𝑅𝐹) (𝑅‘(𝐹𝐺))) = ((𝑅𝐺) (𝑅‘(𝐹𝐺))))

Syntaxctgrp 37986 Extend class notation with translation group.
class TGrp

Definitiondf-tgrp 37987* Define the class of all translation groups. 𝑘 is normally a member of HL. Each base set is the set of all lattice translations with respect to a hyperplane 𝑤, and the operation is function composition. Similar to definition of G in [Crawley] p. 116, third paragraph (which defines this for geomodular lattices). (Contributed by NM, 5-Jun-2013.)
TGrp = (𝑘 ∈ V ↦ (𝑤 ∈ (LHyp‘𝑘) ↦ {⟨(Base‘ndx), ((LTrn‘𝑘)‘𝑤)⟩, ⟨(+g‘ndx), (𝑓 ∈ ((LTrn‘𝑘)‘𝑤), 𝑔 ∈ ((LTrn‘𝑘)‘𝑤) ↦ (𝑓𝑔))⟩}))

Theoremtgrpfset 37988* The translation group maps for a lattice 𝐾. (Contributed by NM, 5-Jun-2013.)
𝐻 = (LHyp‘𝐾)       (𝐾𝑉 → (TGrp‘𝐾) = (𝑤𝐻 ↦ {⟨(Base‘ndx), ((LTrn‘𝐾)‘𝑤)⟩, ⟨(+g‘ndx), (𝑓 ∈ ((LTrn‘𝐾)‘𝑤), 𝑔 ∈ ((LTrn‘𝐾)‘𝑤) ↦ (𝑓𝑔))⟩}))

Theoremtgrpset 37989* The translation group for a fiducial co-atom 𝑊. (Contributed by NM, 5-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝐺 = ((TGrp‘𝐾)‘𝑊)       ((𝐾𝑉𝑊𝐻) → 𝐺 = {⟨(Base‘ndx), 𝑇⟩, ⟨(+g‘ndx), (𝑓𝑇, 𝑔𝑇 ↦ (𝑓𝑔))⟩})

Theoremtgrpbase 37990 The base set of the translation group is the set of all translations (for a fiducial co-atom 𝑊). (Contributed by NM, 5-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝐺 = ((TGrp‘𝐾)‘𝑊)    &   𝐶 = (Base‘𝐺)       ((𝐾𝑉𝑊𝐻) → 𝐶 = 𝑇)

Theoremtgrpopr 37991* The group operation of the translation group is function composition. (Contributed by NM, 5-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝐺 = ((TGrp‘𝐾)‘𝑊)    &    + = (+g𝐺)       ((𝐾𝑉𝑊𝐻) → + = (𝑓𝑇, 𝑔𝑇 ↦ (𝑓𝑔)))

Theoremtgrpov 37992 The group operation value of the translation group is the composition of translations. (Contributed by NM, 5-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝐺 = ((TGrp‘𝐾)‘𝑊)    &    + = (+g𝐺)       ((𝐾𝑉𝑊𝐻 ∧ (𝑋𝑇𝑌𝑇)) → (𝑋 + 𝑌) = (𝑋𝑌))

Theoremtgrpgrplem 37993 Lemma for tgrpgrp 37994. (Contributed by NM, 6-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝑇 = ((LTrn‘𝐾)‘𝑊)    &   𝐺 = ((TGrp‘𝐾)‘𝑊)    &    + = (+g𝐺)    &   𝐵 = (Base‘𝐾)       ((𝐾 ∈ HL ∧ 𝑊𝐻) → 𝐺 ∈ Grp)

Theoremtgrpgrp 37994 The translation group is a group. (Contributed by NM, 6-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝐺 = ((TGrp‘𝐾)‘𝑊)       ((𝐾 ∈ HL ∧ 𝑊𝐻) → 𝐺 ∈ Grp)

Theoremtgrpabl 37995 The translation group is an Abelian group. Lemma G of [Crawley] p. 116. (Contributed by NM, 6-Jun-2013.)
𝐻 = (LHyp‘𝐾)    &   𝐺 = ((TGrp‘𝐾)‘𝑊)       ((𝐾 ∈ HL ∧ 𝑊𝐻) → 𝐺 ∈ Abel)

Syntaxctendo 37996 Extend class notation with translation group endomorphisms.
class TEndo

Syntaxcedring 37997 Extend class notation with division ring on trace-preserving endomorphisms.
class EDRing

Syntaxcedring-rN 37998 Extend class notation with division ring on trace-preserving endomorphisms, with multiplication reversed. TODO: remove EDRingR theorems if not used.
class EDRingR

Definitiondf-tendo 37999* Define trace-preserving endomorphisms on the set of translations. (Contributed by NM, 8-Jun-2013.)
TEndo = (𝑘 ∈ V ↦ (𝑤 ∈ (LHyp‘𝑘) ↦ {𝑓 ∣ (𝑓:((LTrn‘𝑘)‘𝑤)⟶((LTrn‘𝑘)‘𝑤) ∧ ∀𝑥 ∈ ((LTrn‘𝑘)‘𝑤)∀𝑦 ∈ ((LTrn‘𝑘)‘𝑤)(𝑓‘(𝑥𝑦)) = ((𝑓𝑥) ∘ (𝑓𝑦)) ∧ ∀𝑥 ∈ ((LTrn‘𝑘)‘𝑤)(((trL‘𝑘)‘𝑤)‘(𝑓𝑥))(le‘𝑘)(((trL‘𝑘)‘𝑤)‘𝑥))}))

Definitiondf-edring-rN 38000* Define division ring on trace-preserving endomorphisms. Definition of E of [Crawley] p. 117, 4th line from bottom. (Contributed by NM, 8-Jun-2013.)
EDRingR = (𝑘 ∈ V ↦ (𝑤 ∈ (LHyp‘𝑘) ↦ {⟨(Base‘ndx), ((TEndo‘𝑘)‘𝑤)⟩, ⟨(+g‘ndx), (𝑠 ∈ ((TEndo‘𝑘)‘𝑤), 𝑡 ∈ ((TEndo‘𝑘)‘𝑤) ↦ (𝑓 ∈ ((LTrn‘𝑘)‘𝑤) ↦ ((𝑠𝑓) ∘ (𝑡𝑓))))⟩, ⟨(.r‘ndx), (𝑠 ∈ ((TEndo‘𝑘)‘𝑤), 𝑡 ∈ ((TEndo‘𝑘)‘𝑤) ↦ (𝑡𝑠))⟩}))

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