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| Mirrors > Home > ILE Home > Th. List > cnvresid | GIF version | ||
| Description: Converse of a restricted identity function. (Contributed by FL, 4-Mar-2007.) |
| Ref | Expression |
|---|---|
| cnvresid | ⊢ ◡( I ↾ 𝐴) = ( I ↾ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnvi 5158 | . . 3 ⊢ ◡ I = I | |
| 2 | 1 | eqcomi 2236 | . 2 ⊢ I = ◡ I |
| 3 | funi 5375 | . . 3 ⊢ Fun I | |
| 4 | funeq 5363 | . . 3 ⊢ ( I = ◡ I → (Fun I ↔ Fun ◡ I )) | |
| 5 | 3, 4 | mpbii 148 | . 2 ⊢ ( I = ◡ I → Fun ◡ I ) |
| 6 | funcnvres 5420 | . . 3 ⊢ (Fun ◡ I → ◡( I ↾ 𝐴) = (◡ I ↾ ( I “ 𝐴))) | |
| 7 | imai 5109 | . . . 4 ⊢ ( I “ 𝐴) = 𝐴 | |
| 8 | 1, 7 | reseq12i 5027 | . . 3 ⊢ (◡ I ↾ ( I “ 𝐴)) = ( I ↾ 𝐴) |
| 9 | 6, 8 | eqtrdi 2281 | . 2 ⊢ (Fun ◡ I → ◡( I ↾ 𝐴) = ( I ↾ 𝐴)) |
| 10 | 2, 5, 9 | mp2b 8 | 1 ⊢ ◡( I ↾ 𝐴) = ( I ↾ 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 I cid 4400 ◡ccnv 4739 ↾ cres 4742 “ cima 4743 Fun wfun 5337 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2206 ax-ext 2214 ax-sep 4221 ax-pow 4279 ax-pr 4314 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-v 2814 df-un 3214 df-in 3216 df-ss 3223 df-pw 3667 df-sn 3688 df-pr 3689 df-op 3691 df-br 4103 df-opab 4165 df-id 4405 df-xp 4746 df-rel 4747 df-cnv 4748 df-co 4749 df-dm 4750 df-rn 4751 df-res 4752 df-ima 4753 df-fun 5345 |
| This theorem is referenced by: fcoi1 5538 f1oi 5645 xnn0nnen 10785 ssidcn 15045 idhmeo 15152 |
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