Theorem mainer 39578

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 39562	. . . 4 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → ElDisj 𝐴)
2		eldisjim 39517	. . . 4 ⊢ ( ElDisj 𝐴 → CoElEqvRel 𝐴)
3	1, 2	syl 18	. . 3 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → CoElEqvRel 𝐴)
4		n0eldmqseq 39364	. . . . 5 ⊢ ((dom 𝑅 / 𝑅) = 𝐴 → ¬ ∅ ∈ 𝐴)
5	4	adantl 486	. . . 4 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → ¬ ∅ ∈ 𝐴)
6		eldisjn0el 39539	. . . . 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 520	. 2 ⊢ (( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴) → ( CoElEqvRel 𝐴 ∧ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
10		dferALTV2 39383	. 2 ⊢ (𝑅 ErALTV 𝐴 ↔ ( EqvRel 𝑅 ∧ (dom 𝑅 / 𝑅) = 𝐴))
11		dfcomember3 39389	. 2 ⊢ ( CoMembEr 𝐴 ↔ ( CoElEqvRel 𝐴 ∧ (∪ 𝐴 / ∼ 𝐴) = 𝐴))
12	9, 10, 11	3imtr4i 295	1 ⊢ (𝑅 ErALTV 𝐴 → CoMembEr 𝐴)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 400   = wceq 1570   ∈ wcel 2143  ∅c0 4287  ∪ cuni 4873  dom cdm 5663   / cqs 8694   ∼ ccoels 38814   EqvRel weqvrel 38830   CoElEqvRel wcoeleqvrel 38832   ErALTV werALTV 38839   CoMembEr wcomember 38843   ElDisj weldisj 38851

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5258  ax-nul 5270  ax-pr 5406

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rmo 3369  df-rab 3417  df-v 3457  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-opab 5175  df-id 5558  df-eprel 5563  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-ec 8697  df-qs 8701  df-coss 39131  df-coels 39132  df-refrel 39222  df-cnvrefrel 39237  df-symrel 39254  df-trrel 39288  df-eqvrel 39299  df-coeleqvrel 39301  df-dmqs 39353  df-erALTV 39379  df-comember 39381  df-funALTV 39397  df-disjALTV 39420  df-eldisj 39422

This theorem is referenced by:  partimcomember  39579  fences  39588