Theorem extep 35534

Description: Property of epsilon relation, see also extid 35562, extssr 35743 and the comment of df-ssr 35732. (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 35533	. 2 ⊢ (𝐴 ∈ 𝑉 → [𝐴]◡ E = 𝐴)
2		eccnvep 35533	. 2 ⊢ (𝐵 ∈ 𝑊 → [𝐵]◡ E = 𝐵)
3	1, 2	eqeqan12d 2838	1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ([𝐴]◡ E = [𝐵]◡ E ↔ 𝐴 = 𝐵))

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398   = wceq 1533   ∈ wcel 2110   E cep 5459  ^◡ccnv 5549  [cec 8281

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-sep 5196  ax-nul 5203  ax-pr 5322

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3497  df-sbc 3773  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-sn 4562  df-pr 4564  df-op 4568  df-br 5060  df-opab 5122  df-eprel 5460  df-xp 5556  df-rel 5557  df-cnv 5558  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-ec 8285

This theorem is referenced by: (None)