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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 6836 | . 2 ⊢ (𝐹:𝐴–1-1→𝐵 → 𝐹:𝐴–1-1-onto→ran 𝐹) | |
| 2 | f1ococnv1 6854 | . 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 5545 ◡ccnv 5650 ran crn 5652 ↾ cres 5653 ∘ ccom 5655 –1-1→wf1 6535 –1-1-onto→wf1o 6537 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 ax-sep 5249 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 |
| This theorem is used by: f1eqcocnv 7309 domss2 9155 1arithidomlem2 34068 diophrw 43769 |
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