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| Mirrors > Home > MPE Home > Th. List > Mathboxes > extep | Structured version Visualization version GIF version | ||
| Description: Property of epsilon relation, see also extid 38305, extssr 38507 and the comment of df-ssr 38496. (Contributed by Peter Mazsa, 10-Jul-2019.) |
| Ref | Expression |
|---|---|
| extep | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ([𝐴]◡ E = [𝐵]◡ E ↔ 𝐴 = 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eccnvep 38277 | . 2 ⊢ (𝐴 ∈ 𝑉 → [𝐴]◡ E = 𝐴) | |
| 2 | eccnvep 38277 | . 2 ⊢ (𝐵 ∈ 𝑊 → [𝐵]◡ E = 𝐵) | |
| 3 | 1, 2 | eqeqan12d 2744 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ([𝐴]◡ E = [𝐵]◡ E ↔ 𝐴 = 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1540 ∈ wcel 2109 E cep 5540 ◡ccnv 5640 [cec 8672 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pr 5390 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-clab 2709 df-cleq 2722 df-clel 2804 df-ne 2927 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-nul 4300 df-if 4492 df-sn 4593 df-pr 4595 df-op 4599 df-br 5111 df-opab 5173 df-eprel 5541 df-xp 5647 df-rel 5648 df-cnv 5649 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-ec 8676 |
| This theorem is referenced by: (None) |
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