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Theorem latnlemlt 17775
Description: Negation of "less than or equal to" expressed in terms of meet and less-than. (nssinpss 4164 analog.) (Contributed by NM, 5-Feb-2012.)
Hypotheses
Ref Expression
latnlemlt.b 𝐵 = (Base‘𝐾)
latnlemlt.l = (le‘𝐾)
latnlemlt.s < = (lt‘𝐾)
latnlemlt.m = (meet‘𝐾)
Assertion
Ref Expression
latnlemlt ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → (¬ 𝑋 𝑌 ↔ (𝑋 𝑌) < 𝑋))

Proof of Theorem latnlemlt
StepHypRef Expression
1 latnlemlt.b . . . 4 𝐵 = (Base‘𝐾)
2 latnlemlt.l . . . 4 = (le‘𝐾)
3 latnlemlt.m . . . 4 = (meet‘𝐾)
41, 2, 3latmle1 17767 . . 3 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) 𝑋)
54biantrurd 536 . 2 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → ((𝑋 𝑌) ≠ 𝑋 ↔ ((𝑋 𝑌) 𝑋 ∧ (𝑋 𝑌) ≠ 𝑋)))
61, 2, 3latleeqm1 17770 . . 3 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌 ↔ (𝑋 𝑌) = 𝑋))
76necon3bbid 2989 . 2 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → (¬ 𝑋 𝑌 ↔ (𝑋 𝑌) ≠ 𝑋))
8 simp1 1134 . . 3 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → 𝐾 ∈ Lat)
91, 3latmcl 17743 . . 3 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)
10 simp2 1135 . . 3 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → 𝑋𝐵)
11 latnlemlt.s . . . 4 < = (lt‘𝐾)
122, 11pltval 17651 . . 3 ((𝐾 ∈ Lat ∧ (𝑋 𝑌) ∈ 𝐵𝑋𝐵) → ((𝑋 𝑌) < 𝑋 ↔ ((𝑋 𝑌) 𝑋 ∧ (𝑋 𝑌) ≠ 𝑋)))
138, 9, 10, 12syl3anc 1369 . 2 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → ((𝑋 𝑌) < 𝑋 ↔ ((𝑋 𝑌) 𝑋 ∧ (𝑋 𝑌) ≠ 𝑋)))
145, 7, 133bitr4d 314 1 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → (¬ 𝑋 𝑌 ↔ (𝑋 𝑌) < 𝑋))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 209  wa 399  w3a 1085   = wceq 1539  wcel 2112  wne 2952   class class class wbr 5037  cfv 6341  (class class class)co 7157  Basecbs 16556  lecple 16645  ltcplt 17632  meetcmee 17636  Latclat 17736
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1912  ax-6 1971  ax-7 2016  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2730  ax-rep 5161  ax-sep 5174  ax-nul 5181  ax-pow 5239  ax-pr 5303  ax-un 7466
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2071  df-mo 2558  df-eu 2589  df-clab 2737  df-cleq 2751  df-clel 2831  df-nfc 2902  df-ne 2953  df-ral 3076  df-rex 3077  df-reu 3078  df-rab 3080  df-v 3412  df-sbc 3700  df-csb 3809  df-dif 3864  df-un 3866  df-in 3868  df-ss 3878  df-nul 4229  df-if 4425  df-pw 4500  df-sn 4527  df-pr 4529  df-op 4533  df-uni 4803  df-iun 4889  df-br 5038  df-opab 5100  df-mpt 5118  df-id 5435  df-xp 5535  df-rel 5536  df-cnv 5537  df-co 5538  df-dm 5539  df-rn 5540  df-res 5541  df-ima 5542  df-iota 6300  df-fun 6343  df-fn 6344  df-f 6345  df-f1 6346  df-fo 6347  df-f1o 6348  df-fv 6349  df-riota 7115  df-ov 7160  df-oprab 7161  df-proset 17619  df-poset 17637  df-plt 17649  df-lub 17665  df-glb 17666  df-join 17667  df-meet 17668  df-lat 17737
This theorem is referenced by:  hlrelat2  37015
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