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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 6713 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | cnvimassrndm 6149 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) | |
| 3 | 1, 2 | syl 18 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) |
| 4 | fdm 6715 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → dom 𝐹 = 𝐴) | |
| 5 | 3, 4 | eqtrd 2798 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ⊆ wss 3905 ◡ccnv 5660 dom cdm 5661 ran crn 5662 “ cima 5664 ⟶wf 6532 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5257 ax-pr 5404 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-br 5110 df-opab 5174 df-xp 5667 df-cnv 5669 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-fn 6539 df-f 6540 |
| This theorem is used by: fco 6730 f1co 6787 fimacnvinrn 7066 fmpt 7105 fsuppeq 8167 fsuppeqg 8168 fin1a2lem7 10394 cnclima 23434 iscncl 23435 cnindis 23458 cncmp 23558 ptrescn 23805 qtopuni 23868 qtopcld 23879 qtopcmap 23885 ordthmeolem 23967 rnelfmlem 24118 mbfdm 25794 ismbf 25796 mbfimaicc 25799 ismbf2d 25808 ismbf3d 25822 mbfimaopn2 25825 i1fd 25849 plyeq0 26377 elrspunidl 33745 fsumcvg4 34349 zrhunitpreima 34375 imambfm 34661 carsggect 34717 dstrvprob 34871 poimirlem30 38329 dvtan 38349 smfresal 47530 cnneiima 49723 |
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