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| Mirrors > Home > MPE Home > Th. List > f1ococnv2 | Structured version Visualization version GIF version | ||
| Description: The composition of a one-to-one onto function and its converse equals the identity relation restricted to the function's range. (Contributed by NM, 13-Dec-2003.) (Proof shortened by Stefan O'Rear, 12-Feb-2015.) |
| Ref | Expression |
|---|---|
| f1ococnv2 | ⊢ (𝐹:𝐴–1-1-onto→𝐵 → (𝐹 ∘ ◡𝐹) = ( I ↾ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1ofo 6809 | . 2 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴–onto→𝐵) | |
| 2 | fococnv2 6828 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 → (𝐹 ∘ ◡𝐹) = ( I ↾ 𝐵)) | |
| 3 | 1, 2 | syl 17 | 1 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → (𝐹 ∘ ◡𝐹) = ( I ↾ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1559 I cid 5537 ◡ccnv 5642 ↾ cres 5645 ∘ ccom 5647 –onto→wfo 6514 –1-1-onto→wf1o 6515 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-ext 2733 ax-sep 5243 ax-pr 5387 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-sb 2090 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-sn 4580 df-pr 4582 df-op 4586 df-br 5098 df-opab 5160 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 |
| This theorem is referenced by: f1ococnv1 6831 f1ocnvfv2 7256 mapen 9107 hashfacen 14461 setcinv 18114 catcisolem 18134 symginv 19433 f1omvdco2 19479 gsumval3 19938 gsumzf1o 19943 rngcinv 20674 ringcinv 20708 psrass1lem 21973 evl1var 22387 pf1ind 22406 fcobij 32883 cocnvf1o 32892 symgfcoeu 33223 cycpmconjvlem 33282 cycpmconjs 33297 cyc3conja 33298 mplvrpmrhm 33805 erdsze2lem2 35515 ltrncoidN 40713 cdlemg46 41320 cdlemk45 41532 cdlemk55a 41544 tendocnv 41606 eldioph2 43304 rngcinvALTV 48859 ringcinvALTV 48893 |
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