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| Mirrors > Home > MPE Home > Th. List > f1cocnv1 | Structured version Visualization version GIF version | ||
| Description: Composition of an injective function with its converse. (Contributed by FL, 11-Nov-2011.) |
| Ref | Expression |
|---|---|
| f1cocnv1 | ⊢ (𝐹:𝐴–1-1→𝐵 → (◡𝐹 ∘ 𝐹) = ( I ↾ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1f1orn 6832 | . 2 ⊢ (𝐹:𝐴–1-1→𝐵 → 𝐹:𝐴–1-1-onto→ran 𝐹) | |
| 2 | f1ococnv1 6850 | . 2 ⊢ (𝐹:𝐴–1-1-onto→ran 𝐹 → (◡𝐹 ∘ 𝐹) = ( I ↾ 𝐴)) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ (𝐹:𝐴–1-1→𝐵 → (◡𝐹 ∘ 𝐹) = ( I ↾ 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 I cid 5555 ◡ccnv 5660 ran crn 5662 ↾ cres 5663 ∘ ccom 5665 –1-1→wf1 6533 –1-1-onto→wf1o 6535 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5257 ax-pr 5404 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-br 5110 df-opab 5174 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 |
| This theorem is used by: f1eqcocnv 7299 domss2 9120 1arithidomlem2 33835 diophrw 43518 |
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