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Mirrors > Home > MPE Home > Th. List > dfrel3 | Structured version Visualization version 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 6048 | . 2 ⊢ (Rel 𝑅 ↔ ◡◡𝑅 = 𝑅) | |
2 | cnvcnv2 6052 | . . 3 ⊢ ◡◡𝑅 = (𝑅 ↾ V) | |
3 | 2 | eqeq1i 2828 | . 2 ⊢ (◡◡𝑅 = 𝑅 ↔ (𝑅 ↾ V) = 𝑅) |
4 | 1, 3 | bitri 277 | 1 ⊢ (Rel 𝑅 ↔ (𝑅 ↾ V) = 𝑅) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 208 = wceq 1537 Vcvv 3496 ◡ccnv 5556 ↾ cres 5559 Rel wrel 5562 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pr 5332 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-rab 3149 df-v 3498 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-br 5069 df-opab 5131 df-xp 5563 df-rel 5564 df-cnv 5565 df-res 5569 |
This theorem is referenced by: elid 6058 cocnvcnv2 6113 f1ovi 6655 |
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