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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 6826 | . 2 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴–onto→𝐵) | |
| 2 | fococnv2 6845 | . 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 |
| Syntax hints: → wi 4 = wceq 1567 I cid 5553 ◡ccnv 5658 ↾ cres 5661 ∘ ccom 5663 –onto→wfo 6531 –1-1-onto→wf1o 6532 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5258 ax-pr 5402 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-br 5111 df-opab 5175 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 |
| This theorem is referenced by: f1ococnv1 6848 f1ocnvfv2 7273 mapen 9125 hashfacen 14487 setcinv 18143 catcisolem 18163 symginv 19468 f1omvdco2 19514 gsumval3 19973 gsumzf1o 19978 rngcinv 20718 ringcinv 20752 psrass1lem 22048 evl1var 22461 pf1ind 22480 fcobij 33002 cocnvf1o 33011 symgfcoeu 33339 cycpmconjvlem 33398 cycpmconjs 33413 cyc3conja 33414 mplvrpmrhm 33878 erdsze2lem2 35591 ltrncoidN 40787 cdlemg46 41394 cdlemk45 41606 cdlemk55a 41618 tendocnv 41680 eldioph2 43378 rngcinvALTV 48923 ringcinvALTV 48957 |
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