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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 6774 | . 2 ⊢ (𝐹:𝐴–1-1→𝐵 → 𝐹:𝐴–1-1-onto→ran 𝐹) | |
| 2 | f1ococnv1 6792 | . 2 ⊢ (𝐹:𝐴–1-1-onto→ran 𝐹 → (◡𝐹 ∘ 𝐹) = ( I ↾ 𝐴)) | |
| 3 | 1, 2 | syl 17 | 1 ⊢ (𝐹:𝐴–1-1→𝐵 → (◡𝐹 ∘ 𝐹) = ( I ↾ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 I cid 5508 ◡ccnv 5613 ran crn 5615 ↾ cres 5616 ∘ ccom 5618 –1-1→wf1 6478 –1-1-onto→wf1o 6480 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-ext 2703 ax-sep 5232 ax-nul 5242 ax-pr 5368 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2710 df-cleq 2723 df-clel 2806 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-nul 4281 df-if 4473 df-sn 4574 df-pr 4576 df-op 4580 df-br 5090 df-opab 5152 df-id 5509 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 |
| This theorem is referenced by: f1eqcocnv 7235 domss2 9049 1arithidomlem2 33501 diophrw 42862 |
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