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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 6833 | . 2 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴–onto→𝐵) | |
| 2 | fococnv2 6852 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 → (𝐹 ∘ ◡𝐹) = ( I ↾ 𝐵)) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → (𝐹 ∘ ◡𝐹) = ( I ↾ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 I cid 5544 ◡ccnv 5649 ↾ cres 5652 ∘ ccom 5654 –onto→wfo 6537 –1-1-onto→wf1o 6538 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 |
| This theorem is used by: f1ococnv1 6855 f1ocnvfv2 7286 mapen 9164 hashfacen 14603 setcinv 18271 catcisolem 18291 symginv 19622 f1omvdco2 19668 gsumval3 20127 gsumzf1o 20132 rngcinv 20895 ringcinv 20929 psrass1lem 22247 evl1var 22660 pf1ind 22679 fcobij 33359 cocnvf1o 33368 symgfcoeu 33690 cycpmconjvlem 33749 cycpmconjs 33764 cyc3conja 33765 mplvrpmrhm 34226 erdsze2lem2 36056 ltrncoidN 41279 cdlemg46 41886 cdlemk45 42098 cdlemk55a 42110 tendocnv 42172 eldioph2 43867 rngcinvALTV 49467 ringcinvALTV 49501 |
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