Theorem extep 37749

Description: Property of epsilon relation, see also extid 37776, extssr 37975 and the comment of df-ssr 37964. (Contributed by Peter Mazsa, 10-Jul-2019.)

Assertion

Ref	Expression
extep	⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ([𝐴]◡ E = [𝐵]◡ E ↔ 𝐴 = 𝐵))

Proof of Theorem extep

Step	Hyp	Ref	Expression
1		eccnvep 37748	. 2 ⊢ (𝐴 ∈ 𝑉 → [𝐴]◡ E = 𝐴)
2		eccnvep 37748	. 2 ⊢ (𝐵 ∈ 𝑊 → [𝐵]◡ E = 𝐵)
3	1, 2	eqeqan12d 2742	1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ([𝐴]◡ E = [𝐵]◡ E ↔ 𝐴 = 𝐵))

Syntax hints:   → wi 4   ↔ wb 205   ∧ wa 395   = wceq 1534   ∈ wcel 2099   E cep 5575  ^◡ccnv 5671  [cec 8716

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1964  ax-7 2004  ax-8 2101  ax-9 2109  ax-10 2130  ax-11 2147  ax-12 2167  ax-ext 2699  ax-sep 5293  ax-nul 5300  ax-pr 5423

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 847  df-3an 1087  df-tru 1537  df-fal 1547  df-ex 1775  df-nf 1779  df-sb 2061  df-clab 2706  df-cleq 2720  df-clel 2806  df-ne 2937  df-ral 3058  df-rex 3067  df-rab 3429  df-v 3472  df-dif 3948  df-un 3950  df-in 3952  df-ss 3962  df-nul 4319  df-if 4525  df-sn 4625  df-pr 4627  df-op 4631  df-br 5143  df-opab 5205  df-eprel 5576  df-xp 5678  df-rel 5679  df-cnv 5680  df-dm 5682  df-rn 5683  df-res 5684  df-ima 5685  df-ec 8720

This theorem is referenced by: (None)