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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 6677 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | cnvimassrndm 6113 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) | |
| 3 | 1, 2 | syl 17 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) |
| 4 | fdm 6679 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → dom 𝐹 = 𝐴) | |
| 5 | 3, 4 | eqtrd 2764 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ⊆ wss 3911 ◡ccnv 5630 dom cdm 5631 ran crn 5632 “ cima 5634 ⟶wf 6495 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pr 5382 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-ral 3045 df-rex 3054 df-rab 3403 df-v 3446 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-sn 4586 df-pr 4588 df-op 4592 df-br 5103 df-opab 5165 df-xp 5637 df-cnv 5639 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-fn 6502 df-f 6503 |
| This theorem is referenced by: fco 6694 f1co 6749 fimacnvinrn 7025 fmpt 7064 fsuppeq 8131 fsuppeqg 8132 fin1a2lem7 10335 cnclima 23188 iscncl 23189 cnindis 23212 cncmp 23312 ptrescn 23559 qtopuni 23622 qtopcld 23633 qtopcmap 23639 ordthmeolem 23721 rnelfmlem 23872 mbfdm 25560 ismbf 25562 mbfimaicc 25565 ismbf2d 25574 ismbf3d 25588 mbfimaopn2 25591 i1fd 25615 plyeq0 26149 elrspunidl 33392 fsumcvg4 33933 zrhunitpreima 33959 imambfm 34246 carsggect 34302 dstrvprob 34456 poimirlem30 37637 dvtan 37657 smfresal 46779 cnneiima 48898 |
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