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| Mirrors > Home > MPE Home > Th. List > fimacnv | Structured version Visualization version GIF version | ||
| Description: The preimage of the codomain of a function is the function's domain. (Contributed by FL, 25-Jan-2007.) (Proof shortened by AV, 20-Sep-2024.) |
| Ref | Expression |
|---|---|
| fimacnv | ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | frn 6701 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | cnvimassrndm 6139 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) | |
| 3 | 1, 2 | syl 17 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) |
| 4 | fdm 6703 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → dom 𝐹 = 𝐴) | |
| 5 | 3, 4 | eqtrd 2799 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1562 ⊆ wss 3906 ◡ccnv 5648 dom cdm 5649 ran crn 5650 “ cima 5652 ⟶wf 6519 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-ext 2736 ax-sep 5248 ax-pr 5392 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-sb 2093 df-clab 2743 df-cleq 2756 df-clel 2839 df-ral 3079 df-rex 3089 df-rab 3417 df-v 3458 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5103 df-opab 5165 df-xp 5655 df-cnv 5657 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-fn 6526 df-f 6527 |
| This theorem is referenced by: fco 6718 f1co 6775 fimacnvinrn 7054 fmpt 7093 fsuppeq 8157 fsuppeqg 8158 fin1a2lem7 10365 cnclima 23330 iscncl 23331 cnindis 23354 cncmp 23454 ptrescn 23701 qtopuni 23764 qtopcld 23775 qtopcmap 23781 ordthmeolem 23863 rnelfmlem 24014 mbfdm 25690 ismbf 25692 mbfimaicc 25695 ismbf2d 25704 ismbf3d 25718 mbfimaopn2 25721 i1fd 25745 plyeq0 26273 elrspunidl 33616 fsumcvg4 34249 zrhunitpreima 34275 imambfm 34561 carsggect 34617 dstrvprob 34771 poimirlem30 38154 dvtan 38174 smfresal 47367 cnneiima 49543 |
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