Theorem pol0N 37037

Description: The polarity of the empty projective subspace is the whole space. (Contributed by NM, 29-Oct-2011.) (New usage is discouraged.)

Hypotheses

Ref	Expression
polssat.a	⊢ 𝐴 = (Atoms‘𝐾)
polssat.p	⊢ ⊥ = (⊥𝑃‘𝐾)

Assertion

Ref	Expression
pol0N	⊢ (𝐾 ∈ 𝐵 → ( ⊥ ‘∅) = 𝐴)

Proof of Theorem pol0N

Dummy variable 𝑝 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		0ss 4348	. . 3 ⊢ ∅ ⊆ 𝐴
2		eqid 2819	. . . 4 ⊢ (oc‘𝐾) = (oc‘𝐾)
3		polssat.a	. . . 4 ⊢ 𝐴 = (Atoms‘𝐾)
4		eqid 2819	. . . 4 ⊢ (pmap‘𝐾) = (pmap‘𝐾)
5		polssat.p	. . . 4 ⊢ ⊥ = (⊥𝑃‘𝐾)
6	2, 3, 4, 5	polvalN 37033	. . 3 ⊢ ((𝐾 ∈ 𝐵 ∧ ∅ ⊆ 𝐴) → ( ⊥ ‘∅) = (𝐴 ∩ ∩ 𝑝 ∈ ∅ ((pmap‘𝐾)‘((oc‘𝐾)‘𝑝))))
7	1, 6	mpan2 689	. 2 ⊢ (𝐾 ∈ 𝐵 → ( ⊥ ‘∅) = (𝐴 ∩ ∩ 𝑝 ∈ ∅ ((pmap‘𝐾)‘((oc‘𝐾)‘𝑝))))
8		0iin 4978	. . . 4 ⊢ ∩ 𝑝 ∈ ∅ ((pmap‘𝐾)‘((oc‘𝐾)‘𝑝)) = V
9	8	ineq2i 4184	. . 3 ⊢ (𝐴 ∩ ∩ 𝑝 ∈ ∅ ((pmap‘𝐾)‘((oc‘𝐾)‘𝑝))) = (𝐴 ∩ V)
10		inv1 4346	. . 3 ⊢ (𝐴 ∩ V) = 𝐴
11	9, 10	eqtri 2842	. 2 ⊢ (𝐴 ∩ ∩ 𝑝 ∈ ∅ ((pmap‘𝐾)‘((oc‘𝐾)‘𝑝))) = 𝐴
12	7, 11	syl6eq 2870	1 ⊢ (𝐾 ∈ 𝐵 → ( ⊥ ‘∅) = 𝐴)

Syntax hints:   → wi 4   = wceq 1531   ∈ wcel 2108  Vcvv 3493   ∩ cin 3933   ⊆ wss 3934  ∅c0 4289  ∩ ciin 4911  ‘cfv 6348  occoc 16565  Atomscatm 36391  pmapcpmap 36625  ⊥_𝑃cpolN 37030

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1905  ax-6 1964  ax-7 2009  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2154  ax-12 2170  ax-ext 2791  ax-rep 5181  ax-sep 5194  ax-nul 5201  ax-pow 5257  ax-pr 5320

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1084  df-tru 1534  df-ex 1775  df-nf 1779  df-sb 2064  df-mo 2616  df-eu 2648  df-clab 2798  df-cleq 2812  df-clel 2891  df-nfc 2961  df-ne 3015  df-ral 3141  df-rex 3142  df-reu 3143  df-rab 3145  df-v 3495  df-sbc 3771  df-csb 3882  df-dif 3937  df-un 3939  df-in 3941  df-ss 3950  df-nul 4290  df-if 4466  df-pw 4539  df-sn 4560  df-pr 4562  df-op 4566  df-uni 4831  df-iun 4912  df-iin 4913  df-br 5058  df-opab 5120  df-mpt 5138  df-id 5453  df-xp 5554  df-rel 5555  df-cnv 5556  df-co 5557  df-dm 5558  df-rn 5559  df-res 5560  df-ima 5561  df-iota 6307  df-fun 6350  df-fn 6351  df-f 6352  df-f1 6353  df-fo 6354  df-f1o 6355  df-fv 6356  df-polarityN 37031

This theorem is referenced by:  2pol0N  37039  1psubclN  37072  osumcllem9N  37092  pexmidN  37097  pexmidlem6N  37103  pexmidALTN  37106