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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 6787 | . 2 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴–onto→𝐵) | |
| 2 | fococnv2 6806 | . 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 1542 I cid 5525 ◡ccnv 5630 ↾ cres 5633 ∘ ccom 5635 –onto→wfo 6496 –1-1-onto→wf1o 6497 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2708 ax-sep 5231 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-br 5086 df-opab 5148 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 |
| This theorem is referenced by: f1ococnv1 6809 f1ocnvfv2 7232 mapen 9079 hashfacen 14416 setcinv 18057 catcisolem 18077 symginv 19377 f1omvdco2 19423 gsumval3 19882 gsumzf1o 19887 rngcinv 20614 ringcinv 20648 psrass1lem 21912 evl1var 22301 pf1ind 22320 fcobij 32793 cocnvf1o 32802 symgfcoeu 33143 cycpmconjvlem 33202 cycpmconjs 33217 cyc3conja 33218 mplvrpmrhm 33691 erdsze2lem2 35386 ltrncoidN 40574 cdlemg46 41181 cdlemk45 41393 cdlemk55a 41405 tendocnv 41467 eldioph2 43194 rngcinvALTV 48752 ringcinvALTV 48786 |
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