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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 5584 | . . 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 5393 | . . . 4 ⊢ (Fun ◡𝐹 → ◡(𝐹 ↾ 𝑅) = (◡𝐹 ↾ (𝐹 “ 𝑅))) | |
| 4 | df-ima 4731 | . . . . . 6 ⊢ (𝐹 “ 𝑅) = ran (𝐹 ↾ 𝑅) | |
| 5 | dff1o5 5580 | . . . . . . 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 2274 | . . . . 5 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → (𝐹 “ 𝑅) = 𝑃) |
| 8 | 7 | reseq2d 5004 | . . . 4 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → (◡𝐹 ↾ (𝐹 “ 𝑅)) = (◡𝐹 ↾ 𝑃)) |
| 9 | 3, 8 | sylan9eq 2282 | . . 3 ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → ◡(𝐹 ↾ 𝑅) = (◡𝐹 ↾ 𝑃)) |
| 10 | f1oeq1 5559 | . . 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 1395 ◡ccnv 4717 ran crn 4719 ↾ cres 4720 “ cima 4721 Fun wfun 5311 –1-1→wf1 5314 –1-1-onto→wf1o 5316 |
| 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 4201 ax-pow 4257 ax-pr 4292 |
| 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 2801 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-br 4083 df-opab 4145 df-id 4383 df-xp 4724 df-rel 4725 df-cnv 4726 df-co 4727 df-dm 4728 df-rn 4729 df-res 4730 df-ima 4731 df-fun 5319 df-fn 5320 df-f 5321 df-f1 5322 df-fo 5323 df-f1o 5324 |
| This theorem is referenced by: f1oresrab 5799 |
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