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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 mapping is the mapping's domain. (Contributed by FL, 25-Jan-2007.) |
Ref | Expression |
---|---|
fimacnv | ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imassrn 5477 | . . 3 ⊢ (◡𝐹 “ 𝐵) ⊆ ran ◡𝐹 | |
2 | dfdm4 5316 | . . . 4 ⊢ dom 𝐹 = ran ◡𝐹 | |
3 | fdm 6051 | . . . . 5 ⊢ (𝐹:𝐴⟶𝐵 → dom 𝐹 = 𝐴) | |
4 | ssid 3624 | . . . . 5 ⊢ 𝐴 ⊆ 𝐴 | |
5 | 3, 4 | syl6eqss 3655 | . . . 4 ⊢ (𝐹:𝐴⟶𝐵 → dom 𝐹 ⊆ 𝐴) |
6 | 2, 5 | syl5eqssr 3650 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ran ◡𝐹 ⊆ 𝐴) |
7 | 1, 6 | syl5ss 3614 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) ⊆ 𝐴) |
8 | imassrn 5477 | . . . 4 ⊢ (𝐹 “ 𝐴) ⊆ ran 𝐹 | |
9 | frn 6053 | . . . 4 ⊢ (𝐹:𝐴⟶𝐵 → ran 𝐹 ⊆ 𝐵) | |
10 | 8, 9 | syl5ss 3614 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → (𝐹 “ 𝐴) ⊆ 𝐵) |
11 | ffun 6048 | . . . 4 ⊢ (𝐹:𝐴⟶𝐵 → Fun 𝐹) | |
12 | 4, 3 | syl5sseqr 3654 | . . . 4 ⊢ (𝐹:𝐴⟶𝐵 → 𝐴 ⊆ dom 𝐹) |
13 | funimass3 6333 | . . . 4 ⊢ ((Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹) → ((𝐹 “ 𝐴) ⊆ 𝐵 ↔ 𝐴 ⊆ (◡𝐹 “ 𝐵))) | |
14 | 11, 12, 13 | syl2anc 693 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ((𝐹 “ 𝐴) ⊆ 𝐵 ↔ 𝐴 ⊆ (◡𝐹 “ 𝐵))) |
15 | 10, 14 | mpbid 222 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐴 ⊆ (◡𝐹 “ 𝐵)) |
16 | 7, 15 | eqssd 3620 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (◡𝐹 “ 𝐵) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 = wceq 1483 ⊆ wss 3574 ◡ccnv 5113 dom cdm 5114 ran crn 5115 “ cima 5117 Fun wfun 5882 ⟶wf 5884 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-fv 5896 |
This theorem is referenced by: fimacnvinrn 6348 fmpt 6381 frnsuppeq 7307 fin1a2lem7 9228 cnclima 21072 iscncl 21073 cnindis 21096 cncmp 21195 ptrescn 21442 qtopuni 21505 qtopcld 21516 qtopcmap 21522 ordthmeolem 21604 rnelfmlem 21756 mbfdm 23395 ismbf 23397 mbfimaicc 23400 ismbf2d 23408 ismbf3d 23421 mbfimaopn2 23424 i1fd 23448 plyeq0 23967 fsumcvg4 29996 zrhunitpreima 30022 imambfm 30324 carsggect 30380 dstrvprob 30533 poimirlem30 33439 dvtan 33460 smfresal 40995 |
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