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| Mirrors > Home > MPE Home > Th. List > f1ocnvdm | Structured version Visualization version GIF version | ||
| Description: The value of the converse of a one-to-one onto function belongs to its domain. (Contributed by NM, 26-May-2006.) |
| Ref | Expression |
|---|---|
| f1ocnvdm | ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐵) → (◡𝐹‘𝐶) ∈ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1ocnv 6826 | . . 3 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → ◡𝐹:𝐵–1-1-onto→𝐴) | |
| 2 | f1of 6813 | . . 3 ⊢ (◡𝐹:𝐵–1-1-onto→𝐴 → ◡𝐹:𝐵⟶𝐴) | |
| 3 | 1, 2 | syl 18 | . 2 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → ◡𝐹:𝐵⟶𝐴) |
| 4 | 3 | ffvelcdmda 7073 | 1 ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐵) → (◡𝐹‘𝐶) ∈ 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 ◡ccnv 5647 ⟶wf 6524 –1-1-onto→wf1o 6527 ‘cfv 6528 |
| 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-10 2178 ax-12 2213 ax-ext 2732 ax-sep 5249 ax-nul 5260 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-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 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-uni 4868 df-br 5104 df-opab 5168 df-id 5543 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-iota 6484 df-fun 6530 df-fn 6531 df-f 6532 df-f1 6533 df-fo 6534 df-f1o 6535 df-fv 6536 |
| This theorem is used by: f1oiso2 7349 f1ocnvfv3 7404 dif1enlem 9154 rexdif1en 9155 dif1en 9156 uzrdglem 14054 uzrdgsuci 14057 fzennn 14065 cardfz 14067 fzfi 14069 iunmbl2 25825 addonbday 28584 noseqrdglem 28610 noseqrdgsuc 28613 bdayfinlem 28791 f1otrg 29367 axcontlem10 29470 wlkiswwlks2lem5 30381 clwlkclwwlklem2a 30508 cnvbraval 32631 cnvbracl 32632 cycpmco2lem6 33611 cycpmco2 33613 mndpluscn 34477 vonf1oonfo 35813 ismtycnv 38650 rngoisocnv 38829 lautcnvclN 41059 lautcnvle 41060 lautcvr 41063 lautj 41064 lautm 41065 ltrncnvatb 41109 diacnvclN 42022 dihcnvcl 42242 dihlspsnat 42304 dihglblem6 42311 dochocss 42337 dochnoncon 42362 mapdcnvcl 42623 rmxyelxp 43851 cantnfub 44260 isuspgrim0lem 48907 isuspgrim0 48908 upgrimwlklem2 48912 upgrimtrls 48920 uhgrimisgrgriclem 48944 clnbgrgrimlem 48947 uspgrlimlem3 49004 grlicsym 49027 imaf1homlem 50131 uptrar 50240 |
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