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| Mirrors > Home > ILE Home > Th. List > f1orescnv | GIF version | ||
| Description: The converse of a one-to-one-onto restricted function. (Contributed by Paul Chapman, 21-Apr-2008.) |
| Ref | Expression |
|---|---|
| f1orescnv | ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → (◡𝐹 ↾ 𝑃):𝑃–1-1-onto→𝑅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1ocnv 5529 | . . 3 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → ◡(𝐹 ↾ 𝑅):𝑃–1-1-onto→𝑅) | |
| 2 | 1 | adantl 277 | . 2 ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → ◡(𝐹 ↾ 𝑅):𝑃–1-1-onto→𝑅) |
| 3 | funcnvres 5341 | . . . 4 ⊢ (Fun ◡𝐹 → ◡(𝐹 ↾ 𝑅) = (◡𝐹 ↾ (𝐹 “ 𝑅))) | |
| 4 | df-ima 4686 | . . . . . 6 ⊢ (𝐹 “ 𝑅) = ran (𝐹 ↾ 𝑅) | |
| 5 | dff1o5 5525 | . . . . . . 7 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 ↔ ((𝐹 ↾ 𝑅):𝑅–1-1→𝑃 ∧ ran (𝐹 ↾ 𝑅) = 𝑃)) | |
| 6 | 5 | simprbi 275 | . . . . . 6 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → ran (𝐹 ↾ 𝑅) = 𝑃) |
| 7 | 4, 6 | eqtrid 2249 | . . . . 5 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → (𝐹 “ 𝑅) = 𝑃) |
| 8 | 7 | reseq2d 4956 | . . . 4 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → (◡𝐹 ↾ (𝐹 “ 𝑅)) = (◡𝐹 ↾ 𝑃)) |
| 9 | 3, 8 | sylan9eq 2257 | . . 3 ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → ◡(𝐹 ↾ 𝑅) = (◡𝐹 ↾ 𝑃)) |
| 10 | f1oeq1 5504 | . . 3 ⊢ (◡(𝐹 ↾ 𝑅) = (◡𝐹 ↾ 𝑃) → (◡(𝐹 ↾ 𝑅):𝑃–1-1-onto→𝑅 ↔ (◡𝐹 ↾ 𝑃):𝑃–1-1-onto→𝑅)) | |
| 11 | 9, 10 | syl 14 | . 2 ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → (◡(𝐹 ↾ 𝑅):𝑃–1-1-onto→𝑅 ↔ (◡𝐹 ↾ 𝑃):𝑃–1-1-onto→𝑅)) |
| 12 | 2, 11 | mpbid 147 | 1 ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → (◡𝐹 ↾ 𝑃):𝑃–1-1-onto→𝑅) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1372 ◡ccnv 4672 ran crn 4674 ↾ cres 4675 “ cima 4676 Fun wfun 5262 –1-1→wf1 5265 –1-1-onto→wf1o 5267 |
| 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 710 ax-5 1469 ax-7 1470 ax-gen 1471 ax-ie1 1515 ax-ie2 1516 ax-8 1526 ax-10 1527 ax-11 1528 ax-i12 1529 ax-bndl 1531 ax-4 1532 ax-17 1548 ax-i9 1552 ax-ial 1556 ax-i5r 1557 ax-14 2178 ax-ext 2186 ax-sep 4161 ax-pow 4217 ax-pr 4252 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1375 df-nf 1483 df-sb 1785 df-eu 2056 df-mo 2057 df-clab 2191 df-cleq 2197 df-clel 2200 df-nfc 2336 df-ral 2488 df-rex 2489 df-v 2773 df-un 3169 df-in 3171 df-ss 3178 df-pw 3617 df-sn 3638 df-pr 3639 df-op 3641 df-br 4044 df-opab 4105 df-id 4338 df-xp 4679 df-rel 4680 df-cnv 4681 df-co 4682 df-dm 4683 df-rn 4684 df-res 4685 df-ima 4686 df-fun 5270 df-fn 5271 df-f 5272 df-f1 5273 df-fo 5274 df-f1o 5275 |
| This theorem is referenced by: f1oresrab 5739 |
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