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Mirrors > Home > MPE Home > Th. List > f1orescnv | Structured version Visualization version 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 6712 | . . 3 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → ◡(𝐹 ↾ 𝑅):𝑃–1-1-onto→𝑅) | |
2 | 1 | adantl 481 | . 2 ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → ◡(𝐹 ↾ 𝑅):𝑃–1-1-onto→𝑅) |
3 | funcnvres 6496 | . . . 4 ⊢ (Fun ◡𝐹 → ◡(𝐹 ↾ 𝑅) = (◡𝐹 ↾ (𝐹 “ 𝑅))) | |
4 | df-ima 5593 | . . . . . 6 ⊢ (𝐹 “ 𝑅) = ran (𝐹 ↾ 𝑅) | |
5 | dff1o5 6709 | . . . . . . 7 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 ↔ ((𝐹 ↾ 𝑅):𝑅–1-1→𝑃 ∧ ran (𝐹 ↾ 𝑅) = 𝑃)) | |
6 | 5 | simprbi 496 | . . . . . 6 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → ran (𝐹 ↾ 𝑅) = 𝑃) |
7 | 4, 6 | eqtrid 2790 | . . . . 5 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → (𝐹 “ 𝑅) = 𝑃) |
8 | 7 | reseq2d 5880 | . . . 4 ⊢ ((𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃 → (◡𝐹 ↾ (𝐹 “ 𝑅)) = (◡𝐹 ↾ 𝑃)) |
9 | 3, 8 | sylan9eq 2799 | . . 3 ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → ◡(𝐹 ↾ 𝑅) = (◡𝐹 ↾ 𝑃)) |
10 | 9 | f1oeq1d 6695 | . 2 ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → (◡(𝐹 ↾ 𝑅):𝑃–1-1-onto→𝑅 ↔ (◡𝐹 ↾ 𝑃):𝑃–1-1-onto→𝑅)) |
11 | 2, 10 | mpbid 231 | 1 ⊢ ((Fun ◡𝐹 ∧ (𝐹 ↾ 𝑅):𝑅–1-1-onto→𝑃) → (◡𝐹 ↾ 𝑃):𝑃–1-1-onto→𝑅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ◡ccnv 5579 ran crn 5581 ↾ cres 5582 “ cima 5583 Fun wfun 6412 –1-1→wf1 6415 –1-1-onto→wf1o 6417 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-br 5071 df-opab 5133 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 |
This theorem is referenced by: f1oresrab 6981 relogf1o 25627 |
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