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| Mirrors > Home > ILE Home > Th. List > dfrel3 | GIF version | ||
| Description: Alternate definition of relation. (Contributed by NM, 14-May-2008.) |
| Ref | Expression |
|---|---|
| dfrel3 | ⊢ (Rel 𝑅 ↔ (𝑅 ↾ V) = 𝑅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfrel2 5185 | . 2 ⊢ (Rel 𝑅 ↔ ◡◡𝑅 = 𝑅) | |
| 2 | cnvcnv2 5188 | . . 3 ⊢ ◡◡𝑅 = (𝑅 ↾ V) | |
| 3 | 2 | eqeq1i 2237 | . 2 ⊢ (◡◡𝑅 = 𝑅 ↔ (𝑅 ↾ V) = 𝑅) |
| 4 | 1, 3 | bitri 184 | 1 ⊢ (Rel 𝑅 ↔ (𝑅 ↾ V) = 𝑅) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 105 = wceq 1395 Vcvv 2800 ◡ccnv 4722 ↾ cres 4725 Rel wrel 4728 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-br 4087 df-opab 4149 df-xp 4729 df-rel 4730 df-cnv 4731 df-res 4735 |
| This theorem is referenced by: cocnvcnv2 5246 f1ovi 5620 |
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