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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 7049 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → 〈𝐴, (𝐹‘𝐴)〉 ∈ 𝐹) | |
| 2 | df-br 5112 | . . 3 ⊢ (𝐴𝐹(𝐹‘𝐴) ↔ 〈𝐴, (𝐹‘𝐴)〉 ∈ 𝐹) | |
| 3 | 1, 2 | sylibr 237 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → 𝐴𝐹(𝐹‘𝐴)) |
| 4 | funrel 6557 | . . 3 ⊢ (Fun 𝐹 → Rel 𝐹) | |
| 5 | releldm 5936 | . . 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 2146 〈cop 4597 class class class wbr 5111 dom cdm 5663 Rel wrel 5668 Fun wfun 6534 ‘cfv 6540 |
| 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 2148 ax-9 2156 ax-10 2179 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pr 5406 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-iota 6496 df-fun 6542 df-fn 6543 df-fv 6548 |
| This theorem is used by: fmptco 7129 fpwwe2lem12 10644 fpwwe2 10645 climdm 15631 invco 17852 ffthiso 18012 fuciso 18059 setciso 18172 catciso 18192 rngciso 20789 ringciso 20823 lmcau 25525 dvcnp 26131 dvadd 26152 dvmul 26153 dvaddf 26154 dvmulf 26155 dvco 26159 dvcof 26160 dvcjbr 26161 dvcnvlem 26188 dvferm1 26197 dvferm2 26199 ulmdm 26609 ulmdvlem3 26618 minvecolem4a 31302 hlimf 31662 hhsscms 31703 occllem 31728 occl 31729 chscllem4 32065 fmptcof2 33075 heiborlem9 38530 bfplem1 38533 iscard4 44319 xlimdm 46631 rngcisoALTV 49101 ringcisoALTV 49135 ffvbr 49693 |
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