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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 6834 | . . 3 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → ◡𝐹:𝐵–1-1-onto→𝐴) | |
| 2 | f1of 6821 | . . 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 7080 | 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 5658 ⟶wf 6533 –1-1-onto→wf1o 6536 ‘cfv 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-10 2178 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pr 5402 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 |
| This theorem is used by: f1oiso2 7356 f1ocnvfv3 7411 dif1enlem 9157 rexdif1en 9158 dif1en 9159 uzrdglem 14023 uzrdgsuci 14026 fzennn 14034 cardfz 14036 fzfi 14038 iunmbl2 25786 addonbday 28542 noseqrdglem 28568 noseqrdgsuc 28571 bdayfinlem 28749 f1otrg 29313 axcontlem10 29416 wlkiswwlks2lem5 30327 clwlkclwwlklem2a 30454 cnvbraval 32577 cnvbracl 32578 cycpmco2lem6 33558 cycpmco2 33560 mndpluscn 34423 vonf1oonfo 35699 ismtycnv 38539 rngoisocnv 38718 lautcnvclN 40948 lautcnvle 40949 lautcvr 40952 lautj 40953 lautm 40954 ltrncnvatb 40998 diacnvclN 41911 dihcnvcl 42131 dihlspsnat 42193 dihglblem6 42200 dochocss 42226 dochnoncon 42251 mapdcnvcl 42512 rmxyelxp 43740 cantnfub 44149 isuspgrim0lem 48796 isuspgrim0 48797 upgrimwlklem2 48801 upgrimtrls 48809 uhgrimisgrgriclem 48833 clnbgrgrimlem 48836 uspgrlimlem3 48893 grlicsym 48916 imaf1homlem 50020 uptrar 50129 |
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