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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 6666 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | cnvimassrndm 6107 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) | |
| 3 | 1, 2 | syl 17 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) |
| 4 | fdm 6668 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → dom 𝐹 = 𝐴) | |
| 5 | 3, 4 | eqtrd 2776 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1548 ⊆ wss 3885 ◡ccnv 5620 dom cdm 5621 ran crn 5622 “ cima 5624 ⟶wf 6485 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-ext 2713 ax-sep 5221 ax-pr 5365 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-sb 2075 df-clab 2720 df-cleq 2733 df-clel 2816 df-ral 3056 df-rex 3066 df-rab 3394 df-v 3435 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4265 df-if 4458 df-sn 4559 df-pr 4561 df-op 4565 df-br 5076 df-opab 5138 df-xp 5627 df-cnv 5629 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-fn 6492 df-f 6493 |
| This theorem is referenced by: fco 6683 f1co 6738 fimacnvinrn 7016 fmpt 7055 fsuppeq 8119 fsuppeqg 8120 fin1a2lem7 10323 cnclima 23255 iscncl 23256 cnindis 23279 cncmp 23379 ptrescn 23626 qtopuni 23689 qtopcld 23700 qtopcmap 23706 ordthmeolem 23788 rnelfmlem 23939 mbfdm 25615 ismbf 25617 mbfimaicc 25620 ismbf2d 25629 ismbf3d 25643 mbfimaopn2 25646 i1fd 25670 plyeq0 26198 elrspunidl 33515 fsumcvg4 34146 zrhunitpreima 34172 imambfm 34458 carsggect 34514 dstrvprob 34668 poimirlem30 38032 dvtan 38052 smfresal 47245 cnneiima 49421 |
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