Theorem mainer 39395

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 39379	. . . 4 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → ElDisj 𝐴)
2		eldisjim 39334	. . . 4 ⊢ ( ElDisj 𝐴 → CoElEqvRel 𝐴)
3	1, 2	syl 17	. . 3 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → CoElEqvRel 𝐴)
4		n0eldmqseq 39181	. . . . 5 ⊢ ((dom 𝑅 / 𝑅) = 𝐴 → ¬ ∅ ∈ 𝐴)
5	4	adantl 484	. . . 4 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → ¬ ∅ ∈ 𝐴)
6		eldisjn0el 39356	. . . . 5 ⊢ ( ElDisj 𝐴 → (¬ ∅ ∈ 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
7	1, 6	syl 17	. . . 4 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → (¬ ∅ ∈ 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
8	5, 7	mpbid 234	. . 3 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → (∪ 𝐴 / ∼ 𝐴) = 𝐴)
9	3, 8	jca 518	. 2 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → ( CoElEqvRel 𝐴 ∧ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
10		dferALTV2 39200	. 2 ⊢ (𝑅 ErALTV 𝐴 ↔ ( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴))
11		dfcomember3 39206	. 2 ⊢ ( CoMembEr 𝐴 ↔ ( CoElEqvRel 𝐴 ∧ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
12	9, 10, 11	3imtr4i 294	1 ⊢ (𝑅 ErALTV 𝐴 → CoMembEr 𝐴)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   = wceq 1554   ∈ wcel 2136  ∅c0 4280  ∪ cuni 4859  dom cdm 5640   / cqs 8665   ∼ ccoels 38631   EqvRel weqvrel 38647   CoElEqvRel wcoeleqvrel 38649   ErALTV werALTV 38656   CoMembEr wcomember 38660   ElDisj weldisj 38668

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1809  ax-4 1823  ax-5 1924  ax-6 1981  ax-7 2022  ax-8 2138  ax-9 2146  ax-10 2169  ax-11 2185  ax-12 2206  ax-ext 2728  ax-sep 5240  ax-nul 5250  ax-pr 5384

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 857  df-3an 1097  df-tru 1557  df-fal 1567  df-ex 1794  df-nf 1798  df-sb 2085  df-mo 2560  df-eu 2590  df-clab 2735  df-cleq 2748  df-clel 2831  df-nfc 2905  df-ne 2952  df-ral 3071  df-rex 3081  df-rmo 3361  df-rab 3409  df-v 3450  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4281  df-if 4475  df-sn 4577  df-pr 4579  df-op 4583  df-uni 4860  df-br 5095  df-opab 5157  df-id 5535  df-eprel 5540  df-xp 5646  df-rel 5647  df-cnv 5648  df-co 5649  df-dm 5650  df-rn 5651  df-res 5652  df-ima 5653  df-ec 8668  df-qs 8672  df-coss 38948  df-coels 38949  df-refrel 39039  df-cnvrefrel 39054  df-symrel 39071  df-trrel 39105  df-eqvrel 39116  df-coeleqvrel 39118  df-dmqs 39170  df-erALTV 39196  df-comember 39198  df-funALTV 39214  df-disjALTV 39237  df-eldisj 39239

This theorem is referenced by:  partimcomember  39396  fences  39405