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| Mirrors > Home > MPE Home > Th. List > funfvbrb | Structured version Visualization version GIF version | ||
| Description: Two ways to say that 𝐴 is in the domain of 𝐹. (Contributed by Mario Carneiro, 1-May-2014.) |
| Ref | Expression |
|---|---|
| funfvbrb | ⊢ (Fun 𝐹 → (𝐴 ∈ dom 𝐹 ↔ 𝐴𝐹(𝐹‘𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funfvop 7043 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → 〈𝐴, (𝐹‘𝐴)〉 ∈ 𝐹) | |
| 2 | df-br 5104 | . . 3 ⊢ (𝐴𝐹(𝐹‘𝐴) ↔ 〈𝐴, (𝐹‘𝐴)〉 ∈ 𝐹) | |
| 3 | 1, 2 | sylibr 237 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → 𝐴𝐹(𝐹‘𝐴)) |
| 4 | funrel 6550 | . . 3 ⊢ (Fun 𝐹 → Rel 𝐹) | |
| 5 | releldm 5928 | . . 3 ⊢ ((Rel 𝐹 ∧ 𝐴𝐹(𝐹‘𝐴)) → 𝐴 ∈ dom 𝐹) | |
| 6 | 4, 5 | sylan 592 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴𝐹(𝐹‘𝐴)) → 𝐴 ∈ dom 𝐹) |
| 7 | 3, 6 | impbida 813 | 1 ⊢ (Fun 𝐹 → (𝐴 ∈ dom 𝐹 ↔ 𝐴𝐹(𝐹‘𝐴))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∈ wcel 2145 〈cop 4590 class class class wbr 5103 dom cdm 5655 Rel wrel 5660 Fun wfun 6527 ‘cfv 6533 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-iota 6489 df-fun 6535 df-fn 6536 df-fv 6541 |
| This theorem is used by: fmptco 7124 fpwwe2lem12 10652 fpwwe2 10653 climdm 15642 invco 17861 ffthiso 18021 fuciso 18068 setciso 18181 catciso 18201 rngciso 20801 ringciso 20835 lmcau 25542 dvcnp 26147 dvadd 26168 dvmul 26169 dvaddf 26170 dvmulf 26171 dvco 26175 dvcof 26176 dvcjbr 26177 dvcnvlem 26204 dvferm1 26213 dvferm2 26215 ulmdm 26630 ulmdvlem3 26639 minvecolem4a 31359 hlimf 31719 hhsscms 31760 occllem 31785 occl 31786 chscllem4 32122 fmptcof2 33131 heiborlem9 38570 bfplem1 38573 iscard4 44374 xlimdm 46686 rngcisoALTV 49193 ringcisoALTV 49227 ffvbr 49785 |
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