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Mirrors > Home > MPE Home > Th. List > f1ores | Structured version Visualization version GIF version |
Description: The restriction of a one-to-one function maps one-to-one onto the image. (Contributed by NM, 25-Mar-1998.) |
Ref | Expression |
---|---|
f1ores | ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ 𝐶 ⊆ 𝐴) → (𝐹 ↾ 𝐶):𝐶–1-1-onto→(𝐹 “ 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1ssres 6662 | . . 3 ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ 𝐶 ⊆ 𝐴) → (𝐹 ↾ 𝐶):𝐶–1-1→𝐵) | |
2 | f1f1orn 6711 | . . 3 ⊢ ((𝐹 ↾ 𝐶):𝐶–1-1→𝐵 → (𝐹 ↾ 𝐶):𝐶–1-1-onto→ran (𝐹 ↾ 𝐶)) | |
3 | 1, 2 | syl 17 | . 2 ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ 𝐶 ⊆ 𝐴) → (𝐹 ↾ 𝐶):𝐶–1-1-onto→ran (𝐹 ↾ 𝐶)) |
4 | df-ima 5593 | . . 3 ⊢ (𝐹 “ 𝐶) = ran (𝐹 ↾ 𝐶) | |
5 | f1oeq3 6690 | . . 3 ⊢ ((𝐹 “ 𝐶) = ran (𝐹 ↾ 𝐶) → ((𝐹 ↾ 𝐶):𝐶–1-1-onto→(𝐹 “ 𝐶) ↔ (𝐹 ↾ 𝐶):𝐶–1-1-onto→ran (𝐹 ↾ 𝐶))) | |
6 | 4, 5 | ax-mp 5 | . 2 ⊢ ((𝐹 ↾ 𝐶):𝐶–1-1-onto→(𝐹 “ 𝐶) ↔ (𝐹 ↾ 𝐶):𝐶–1-1-onto→ran (𝐹 ↾ 𝐶)) |
7 | 3, 6 | sylibr 233 | 1 ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ 𝐶 ⊆ 𝐴) → (𝐹 ↾ 𝐶):𝐶–1-1-onto→(𝐹 “ 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1539 ⊆ wss 3883 ran crn 5581 ↾ cres 5582 “ cima 5583 –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-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-sb 2069 df-clab 2716 df-cleq 2730 df-clel 2817 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-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: f1imacnv 6716 f1oresrab 6981 isores3 7186 isoini2 7190 f1imaeng 8755 f1imaen2g 8756 domunsncan 8812 php3 8899 ssfiALT 8919 f1imaenfi 8939 infdifsn 9345 infxpenlem 9700 ackbij2lem2 9927 fin1a2lem6 10092 grothomex 10516 fsumss 15365 ackbijnn 15468 fprodss 15586 unbenlem 16537 eqgen 18724 symgfixelsi 18958 gsumval3lem1 19421 gsumval3lem2 19422 gsumzaddlem 19437 lindsmm 20945 coe1mul2lem2 21349 tsmsf1o 23204 ovoliunlem1 24571 dvcnvrelem2 25087 logf1o2 25710 dvlog 25711 ushgredgedg 27499 ushgredgedgloop 27501 trlreslem 27969 adjbd1o 30348 rinvf1o 30866 padct 30956 indf1ofs 31894 eulerpartgbij 32239 eulerpartlemgh 32245 ballotlemfrc 32393 reprpmtf1o 32506 erdsze2lem2 33066 poimirlem4 35708 poimirlem9 35713 ismtyres 35893 pwfi2f1o 40837 sge0f1o 43810 f1oresf1o 44669 |
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