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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 6833 | . . 3 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → ◡𝐹:𝐵–1-1-onto→𝐴) | |
| 2 | f1of 6820 | . . 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 7079 | 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 400 ∈ wcel 2142 ◡ccnv 5659 ⟶wf 6532 –1-1-onto→wf1o 6535 ‘cfv 6536 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-nul 5268 ax-pr 5403 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3416 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-br 5109 df-opab 5173 df-id 5555 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 |
| This theorem is used by: f1oiso2 7350 f1ocnvfv3 7407 dif1enlem 9142 rexdif1en 9143 dif1en 9144 uzrdglem 14000 uzrdgsuci 14003 fzennn 14011 cardfz 14013 fzfi 14015 iunmbl2 25727 addonbday 28483 noseqrdglem 28509 noseqrdgsuc 28512 bdayfinlem 28690 f1otrg 29231 axcontlem10 29334 wlkiswwlks2lem5 30233 clwlkclwwlklem2a 30360 cnvbraval 32473 cnvbracl 32474 cycpmco2lem6 33460 cycpmco2 33462 mndpluscn 34325 vonf1oonfo 35607 ismtycnv 38481 rngoisocnv 38660 lautcnvclN 40890 lautcnvle 40891 lautcvr 40894 lautj 40895 lautm 40896 ltrncnvatb 40940 diacnvclN 41853 dihcnvcl 42073 dihlspsnat 42135 dihglblem6 42142 dochocss 42168 dochnoncon 42193 mapdcnvcl 42454 rmxyelxp 43667 cantnfub 44076 isuspgrim0lem 48686 isuspgrim0 48687 upgrimwlklem2 48691 upgrimtrls 48699 uhgrimisgrgriclem 48723 clnbgrgrimlem 48726 uspgrlimlem3 48783 grlicsym 48806 imaf1homlem 49913 uptrar 50022 |
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