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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 6837 | . . 3 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → ◡𝐹:𝐵–1-1-onto→𝐴) | |
| 2 | f1of 6824 | . . 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 7084 | 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 2144 ◡ccnv 5649 ⟶wf 6534 –1-1-onto→wf1o 6537 ‘cfv 6538 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 |
| This theorem is used by: f1oiso2 7360 f1ocnvfv3 7415 dif1enlem 9175 rexdif1en 9176 dif1en 9177 uzrdglem 14100 uzrdgsuci 14103 fzennn 14111 cardfz 14113 fzfi 14115 iunmbl2 25878 addonbday 28665 noseqrdglem 28691 noseqrdgsuc 28694 bdayfinlem 28872 f1otrg 29448 axcontlem10 29551 wlkiswwlks2lem5 30462 clwlkclwwlklem2a 30589 cnvbraval 32712 cnvbracl 32713 cycpmco2lem6 33692 cycpmco2 33694 mndpluscn 34558 vonf1oonfo 35898 ismtycnv 38737 rngoisocnv 38916 lautcnvclN 41146 lautcnvle 41147 lautcvr 41150 lautj 41151 lautm 41152 ltrncnvatb 41196 diacnvclN 42109 dihcnvcl 42329 dihlspsnat 42391 dihglblem6 42398 dochocss 42424 dochnoncon 42449 mapdcnvcl 42710 rmxyelxp 43919 cantnfub 44323 isuspgrim0lem 48991 isuspgrim0 48992 upgrimwlklem2 48996 upgrimtrls 49004 uhgrimisgrgriclem 49028 clnbgrgrimlem 49031 uspgrlimlem3 49088 grlicsym 49111 imaf1homlem 50215 uptrar 50324 |
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