| Mathbox for Peter Mazsa |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > brcnvep | Structured version Visualization version GIF version | ||
| Description: The converse of the binary epsilon relation. (Contributed by Peter Mazsa, 30-Jan-2018.) |
| Ref | Expression |
|---|---|
| brcnvep | ⊢ (𝐴 ∈ 𝑉 → (𝐴◡ E 𝐵 ↔ 𝐵 ∈ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rele 5810 | . . 3 ⊢ Rel E | |
| 2 | 1 | relbrcnv 6109 | . 2 ⊢ (𝐴◡ E 𝐵 ↔ 𝐵 E 𝐴) |
| 3 | epelg 5556 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐵 E 𝐴 ↔ 𝐵 ∈ 𝐴)) | |
| 4 | 2, 3 | bitrid 286 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐴◡ E 𝐵 ↔ 𝐵 ∈ 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∈ wcel 2146 class class class wbr 5106 E cep 5554 ◡ccnv 5654 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-ext 2735 ax-sep 5252 ax-pr 5395 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2101 df-clab 2742 df-cleq 2755 df-clel 2839 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-br 5107 df-opab 5171 df-eprel 5555 df-xp 5661 df-rel 5662 df-cnv 5663 |
| This theorem is used by: brcnvepres 39347 eccnvepres 39361 eleccnvep 39362 cnvepres 39379 brxrncnvep 39461 dmcnvep 39463 ecxrncnvep 39484 rnxrncnvepres 39498 dfsucmap3 39538 coss2cnvepres 39583 dfcoels 39595 br1cossincnvepres 39615 br1cossxrncnvepres 39617 dfeldisj5 39888 |
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