| 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 5801 | . . 3 ⊢ Rel E | |
| 2 | 1 | relbrcnv 6097 | . 2 ⊢ (𝐴◡ E 𝐵 ↔ 𝐵 E 𝐴) |
| 3 | epelg 5549 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐵 E 𝐴 ↔ 𝐵 ∈ 𝐴)) | |
| 4 | 2, 3 | bitrid 285 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐴◡ E 𝐵 ↔ 𝐵 ∈ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∈ wcel 2143 class class class wbr 5101 E cep 5547 ◡ccnv 5647 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5247 ax-pr 5391 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-sb 2092 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-ral 3078 df-rex 3088 df-rab 3416 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-br 5102 df-opab 5164 df-eprel 5548 df-xp 5654 df-rel 5655 df-cnv 5656 |
| This theorem is referenced by: brcnvepres 38772 eccnvepres 38786 eleccnvep 38787 cnvepres 38804 brxrncnvep 38886 dmcnvep 38888 ecxrncnvep 38909 rnxrncnvepres 38923 dfsucmap3 38963 coss2cnvepres 39008 dfcoels 39020 br1cossincnvepres 39040 br1cossxrncnvepres 39042 dfeldisj5 39313 |
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