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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 6671 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | cnvimassrndm 6112 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) | |
| 3 | 1, 2 | syl 17 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) |
| 4 | fdm 6673 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → dom 𝐹 = 𝐴) | |
| 5 | 3, 4 | eqtrd 2772 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ⊆ wss 3890 ◡ccnv 5625 dom cdm 5626 ran crn 5627 “ cima 5629 ⟶wf 6490 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5232 ax-pr 5372 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-br 5087 df-opab 5149 df-xp 5632 df-cnv 5634 df-dm 5636 df-rn 5637 df-res 5638 df-ima 5639 df-fn 6497 df-f 6498 |
| This theorem is referenced by: fco 6688 f1co 6743 fimacnvinrn 7019 fmpt 7058 fsuppeq 8120 fsuppeqg 8121 fin1a2lem7 10323 cnclima 23247 iscncl 23248 cnindis 23271 cncmp 23371 ptrescn 23618 qtopuni 23681 qtopcld 23692 qtopcmap 23698 ordthmeolem 23780 rnelfmlem 23931 mbfdm 25607 ismbf 25609 mbfimaicc 25612 ismbf2d 25621 ismbf3d 25635 mbfimaopn2 25638 i1fd 25662 plyeq0 26190 elrspunidl 33507 fsumcvg4 34114 zrhunitpreima 34140 imambfm 34426 carsggect 34482 dstrvprob 34636 poimirlem30 37989 dvtan 38009 smfresal 47238 cnneiima 49408 |
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