Theorem mainer 39848

Description: The Main Theorem of Equivalences: every equivalence relation implies equivalent comembers. (Contributed by Peter Mazsa, 26-Sep-2021.)

Assertion

Ref	Expression
mainer	⊢ (𝑅 ErALTV 𝐴 → CoMembEr 𝐴)

Proof of Theorem mainer

Step	Hyp	Ref	Expression
1		eqvrelqseqdisj2 39832	. . . 4 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → ElDisj 𝐴)
2		eldisjim 39787	. . . 4 ⊢ ( ElDisj 𝐴 → CoElEqvRel 𝐴)
3	1, 2	syl 18	. . 3 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → CoElEqvRel 𝐴)
4		n0eldmqseq 39634	. . . . 5 ⊢ ((dom 𝑅 / 𝑅) = 𝐴 → ¬ ∅ ∈ 𝐴)
5	4	adantl 487	. . . 4 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → ¬ ∅ ∈ 𝐴)
6		eldisjn0el 39809	. . . . 5 ⊢ ( ElDisj 𝐴 → (¬ ∅ ∈ 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
7	1, 6	syl 18	. . . 4 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → (¬ ∅ ∈ 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
8	5, 7	mpbid 235	. . 3 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → (∪ 𝐴 / ∼ 𝐴) = 𝐴)
9	3, 8	jca 521	. 2 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → ( CoElEqvRel 𝐴 ∧ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
10		dferALTV2 39653	. 2 ⊢ (𝑅 ErALTV 𝐴 ↔ ( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴))
11		dfcomember3 39659	. 2 ⊢ ( CoMembEr 𝐴 ↔ ( CoElEqvRel 𝐴 ∧ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
12	9, 10, 11	3imtr4i 295	1 ⊢ (𝑅 ErALTV 𝐴 → CoMembEr 𝐴)

This proof depends on syntax axioms:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 401   = wceq 1570   ∈ wcel 2145  ∅c0 4279  ∪ cuni 4867  dom cdm 5651   / cqs 8700   ∼ ccoels 39084   EqvRel weqvrel 39100   CoElEqvRel wcoeleqvrel 39102   ErALTV werALTV 39109   CoMembEr wcomember 39113   ElDisj weldisj 39121

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733  ax-sep 5249  ax-nul 5260  ax-pr 5391

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2565  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-rmo 3366  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5104  df-opab 5168  df-id 5546  df-eprel 5551  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-ec 8703  df-qs 8707  df-coss 39401  df-coels 39402  df-refrel 39492  df-cnvrefrel 39507  df-symrel 39524  df-trrel 39558  df-eqvrel 39569  df-coeleqvrel 39571  df-dmqs 39623  df-erALTV 39649  df-comember 39651  df-funALTV 39667  df-disjALTV 39690  df-eldisj 39692

This theorem is used by:  partimcomember  39849  fences  39858