Theorem polatN 40651

Description: The polarity of the singleton of an atom (i.e. a point). (Contributed by NM, 14-Jan-2012.) (New usage is discouraged.)

Hypotheses

Ref	Expression
polat.o	⊢ ⊥ = (oc‘𝐾)
polat.a	⊢ 𝐴 = (Atoms‘𝐾)
polat.m	⊢ 𝑀 = (pmap‘𝐾)
polat.p	⊢ 𝑃 = (⊥𝑃‘𝐾)

Assertion

Ref	Expression
polatN	⊢ ((𝐾 ∈ OL ∧ 𝑄 ∈ 𝐴) → (𝑃‘{𝑄}) = (𝑀‘( ⊥ ‘𝑄)))

Proof of Theorem polatN

Dummy variable 𝑝 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		snssi 4750	. . 3 ⊢ (𝑄 ∈ 𝐴 → {𝑄} ⊆ 𝐴)
2		polat.o	. . . 4 ⊢ ⊥ = (oc‘𝐾)
3		polat.a	. . . 4 ⊢ 𝐴 = (Atoms‘𝐾)
4		polat.m	. . . 4 ⊢ 𝑀 = (pmap‘𝐾)
5		polat.p	. . . 4 ⊢ 𝑃 = (⊥𝑃‘𝐾)
6	2, 3, 4, 5	polvalN 40625	. . 3 ⊢ ((𝐾 ∈ OL ∧ {𝑄} ⊆ 𝐴) → (𝑃‘{𝑄}) = (𝐴 ∩ ∩ 𝑝 ∈ {𝑄} (𝑀‘( ⊥ ‘𝑝))))
7	1, 6	sylan2 604	. 2 ⊢ ((𝐾 ∈ OL ∧ 𝑄 ∈ 𝐴) → (𝑃‘{𝑄}) = (𝐴 ∩ ∩ 𝑝 ∈ {𝑄} (𝑀‘( ⊥ ‘𝑝))))
8		2fveq3 6886	. . . . 5 ⊢ (𝑝 = 𝑄 → (𝑀‘( ⊥ ‘𝑝)) = (𝑀‘( ⊥ ‘𝑄)))
9	8	iinxsng 5053	. . . 4 ⊢ (𝑄 ∈ 𝐴 → ∩ 𝑝 ∈ {𝑄} (𝑀‘( ⊥ ‘𝑝)) = (𝑀‘( ⊥ ‘𝑄)))
10	9	adantl 486	. . 3 ⊢ ((𝐾 ∈ OL ∧ 𝑄 ∈ 𝐴) → ∩ 𝑝 ∈ {𝑄} (𝑀‘( ⊥ ‘𝑝)) = (𝑀‘( ⊥ ‘𝑄)))
11	10	ineq2d 4172	. 2 ⊢ ((𝐾 ∈ OL ∧ 𝑄 ∈ 𝐴) → (𝐴 ∩ ∩ 𝑝 ∈ {𝑄} (𝑀‘( ⊥ ‘𝑝))) = (𝐴 ∩ (𝑀‘( ⊥ ‘𝑄))))
12		olop 39934	. . . . 5 ⊢ (𝐾 ∈ OL → 𝐾 ∈ OP)
13		eqid 2761	. . . . . 6 ⊢ (Base‘𝐾) = (Base‘𝐾)
14	13, 3	atbase 40009	. . . . 5 ⊢ (𝑄 ∈ 𝐴 → 𝑄 ∈ (Base‘𝐾))
15	13, 2	opoccl 39914	. . . . 5 ⊢ ((𝐾 ∈ OP ∧ 𝑄 ∈ (Base‘𝐾)) → ( ⊥ ‘𝑄) ∈ (Base‘𝐾))
16	12, 14, 15	syl2an 607	. . . 4 ⊢ ((𝐾 ∈ OL ∧ 𝑄 ∈ 𝐴) → ( ⊥ ‘𝑄) ∈ (Base‘𝐾))
17	13, 3, 4	pmapssat 40479	. . . 4 ⊢ ((𝐾 ∈ OL ∧ ( ⊥ ‘𝑄) ∈ (Base‘𝐾)) → (𝑀‘( ⊥ ‘𝑄)) ⊆ 𝐴)
18	16, 17	syldan 602	. . 3 ⊢ ((𝐾 ∈ OL ∧ 𝑄 ∈ 𝐴) → (𝑀‘( ⊥ ‘𝑄)) ⊆ 𝐴)
19		sseqin2 4175	. . 3 ⊢ ((𝑀‘( ⊥ ‘𝑄)) ⊆ 𝐴 ↔ (𝐴 ∩ (𝑀‘( ⊥ ‘𝑄))) = (𝑀‘( ⊥ ‘𝑄)))
20	18, 19	sylib 221	. 2 ⊢ ((𝐾 ∈ OL ∧ 𝑄 ∈ 𝐴) → (𝐴 ∩ (𝑀‘( ⊥ ‘𝑄))) = (𝑀‘( ⊥ ‘𝑄)))
21	7, 11, 20	3eqtrd 2800	1 ⊢ ((𝐾 ∈ OL ∧ 𝑄 ∈ 𝐴) → (𝑃‘{𝑄}) = (𝑀‘( ⊥ ‘𝑄)))

Syntax hints:   → wi 4   ∧ wa 400   = wceq 1568   ∈ wcel 2141   ∩ cin 3903   ⊆ wss 3904  {csn 4588  ∩ ciin 4956  ‘cfv 6536  Basecbs 17268  occoc 17317  OPcops 39892  OLcol 39894  Atomscatm 39983  pmapcpmap 40217  ⊥_𝑃cpolN 40622

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-rep 5237  ax-sep 5256  ax-nul 5268  ax-pow 5336  ax-pr 5404

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-nf 1812  df-sb 2095  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-reu 3368  df-rab 3415  df-v 3455  df-sbc 3744  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4487  df-pw 4563  df-sn 4589  df-pr 4591  df-op 4595  df-uni 4872  df-iun 4957  df-iin 4958  df-br 5109  df-opab 5173  df-mpt 5192  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-f1 6541  df-fo 6542  df-f1o 6543  df-fv 6544  df-ov 7413  df-oposet 39896  df-ol 39898  df-ats 39987  df-pmap 40224  df-polarityN 40623

This theorem is referenced by:  2polatN  40652