| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 6714 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | cnvimassrndm 6150 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) | |
| 3 | 1, 2 | syl 18 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = dom 𝐹) |
| 4 | fdm 6716 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → dom 𝐹 = 𝐴) | |
| 5 | 3, 4 | eqtrd 2804 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ⊆ wss 3913 ◡ccnv 5661 dom cdm 5662 ran crn 5663 “ cima 5665 ⟶wf 6533 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5114 df-opab 5178 df-xp 5668 df-cnv 5670 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-fn 6540 df-f 6541 |
| This theorem is referenced by: fco 6731 f1co 6788 fimacnvinrn 7067 fmpt 7106 fsuppeq 8171 fsuppeqg 8172 fin1a2lem7 10390 cnclima 23394 iscncl 23395 cnindis 23418 cncmp 23518 ptrescn 23765 qtopuni 23828 qtopcld 23839 qtopcmap 23845 ordthmeolem 23927 rnelfmlem 24078 mbfdm 25754 ismbf 25756 mbfimaicc 25759 ismbf2d 25768 ismbf3d 25782 mbfimaopn2 25785 i1fd 25809 plyeq0 26337 elrspunidl 33680 fsumcvg4 34285 zrhunitpreima 34311 imambfm 34597 carsggect 34653 dstrvprob 34807 poimirlem30 38223 dvtan 38243 smfresal 47428 cnneiima 49614 |
| Copyright terms: Public domain | W3C validator |