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Mirrors > Home > MPE Home > Th. List > f1ocnvfv1 | Structured version Visualization version GIF version |
Description: The converse value of the value of a one-to-one onto function. (Contributed by NM, 20-May-2004.) |
Ref | Expression |
---|---|
f1ocnvfv1 | ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → (◡𝐹‘(𝐹‘𝐶)) = 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1ococnv1 6618 | . . . 4 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → (◡𝐹 ∘ 𝐹) = ( I ↾ 𝐴)) | |
2 | 1 | fveq1d 6647 | . . 3 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → ((◡𝐹 ∘ 𝐹)‘𝐶) = (( I ↾ 𝐴)‘𝐶)) |
3 | 2 | adantr 484 | . 2 ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → ((◡𝐹 ∘ 𝐹)‘𝐶) = (( I ↾ 𝐴)‘𝐶)) |
4 | f1of 6590 | . . 3 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴⟶𝐵) | |
5 | fvco3 6737 | . . 3 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐶 ∈ 𝐴) → ((◡𝐹 ∘ 𝐹)‘𝐶) = (◡𝐹‘(𝐹‘𝐶))) | |
6 | 4, 5 | sylan 583 | . 2 ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → ((◡𝐹 ∘ 𝐹)‘𝐶) = (◡𝐹‘(𝐹‘𝐶))) |
7 | fvresi 6912 | . . 3 ⊢ (𝐶 ∈ 𝐴 → (( I ↾ 𝐴)‘𝐶) = 𝐶) | |
8 | 7 | adantl 485 | . 2 ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → (( I ↾ 𝐴)‘𝐶) = 𝐶) |
9 | 3, 6, 8 | 3eqtr3d 2841 | 1 ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → (◡𝐹‘(𝐹‘𝐶)) = 𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1538 ∈ wcel 2111 I cid 5424 ◡ccnv 5518 ↾ cres 5521 ∘ ccom 5523 ⟶wf 6320 –1-1-onto→wf1o 6323 ‘cfv 6324 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 |
This theorem is referenced by: f1ocnvfv 7013 wemapwe 9144 fseqenlem2 9436 acndom 9462 isf34lem5 9789 axcc3 9849 pwfseqlem1 10069 hashdom 13736 fz1isolem 13815 cnrecnv 14516 sadcadd 15797 sadadd2 15799 invinv 17032 catcisolem 17358 mhmf1o 17958 srngnvl 19620 mdetleib2 21193 2ndcdisj 22061 cnheiborlem 23559 iunmbl2 24161 dvcnvlem 24579 eff1olem 25140 logef 25173 adjbdlnb 29867 cnvbrabra 29895 fsumiunle 30571 fzto1stinvn 30796 cycpmfv1 30805 cycpmfv2 30806 cycpmco2lem7 30824 madjusmdetlem1 31180 tpr2rico 31265 esumiun 31463 lautj 37389 lautm 37390 ldilcnv 37411 ltrneq2 37444 trlcnv 37461 diaocN 38421 dihcnvid1 38568 dochocss 38662 mapdcnvid1N 38950 isomushgr 44344 |
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