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Mirrors > Home > MPE Home > Th. List > fvimacnvi | Structured version Visualization version GIF version |
Description: A member of a preimage is a function value argument. (Contributed by NM, 4-May-2007.) |
Ref | Expression |
---|---|
fvimacnvi | ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → (𝐹‘𝐴) ∈ 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | snssi 4280 | . . 3 ⊢ (𝐴 ∈ (◡𝐹 “ 𝐵) → {𝐴} ⊆ (◡𝐹 “ 𝐵)) | |
2 | funimass2 5886 | . . 3 ⊢ ((Fun 𝐹 ∧ {𝐴} ⊆ (◡𝐹 “ 𝐵)) → (𝐹 “ {𝐴}) ⊆ 𝐵) | |
3 | 1, 2 | sylan2 490 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → (𝐹 “ {𝐴}) ⊆ 𝐵) |
4 | fvex 6113 | . . . 4 ⊢ (𝐹‘𝐴) ∈ V | |
5 | 4 | snss 4259 | . . 3 ⊢ ((𝐹‘𝐴) ∈ 𝐵 ↔ {(𝐹‘𝐴)} ⊆ 𝐵) |
6 | cnvimass 5404 | . . . . . 6 ⊢ (◡𝐹 “ 𝐵) ⊆ dom 𝐹 | |
7 | 6 | sseli 3564 | . . . . 5 ⊢ (𝐴 ∈ (◡𝐹 “ 𝐵) → 𝐴 ∈ dom 𝐹) |
8 | funfn 5833 | . . . . . 6 ⊢ (Fun 𝐹 ↔ 𝐹 Fn dom 𝐹) | |
9 | fnsnfv 6168 | . . . . . 6 ⊢ ((𝐹 Fn dom 𝐹 ∧ 𝐴 ∈ dom 𝐹) → {(𝐹‘𝐴)} = (𝐹 “ {𝐴})) | |
10 | 8, 9 | sylanb 488 | . . . . 5 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → {(𝐹‘𝐴)} = (𝐹 “ {𝐴})) |
11 | 7, 10 | sylan2 490 | . . . 4 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → {(𝐹‘𝐴)} = (𝐹 “ {𝐴})) |
12 | 11 | sseq1d 3595 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → ({(𝐹‘𝐴)} ⊆ 𝐵 ↔ (𝐹 “ {𝐴}) ⊆ 𝐵)) |
13 | 5, 12 | syl5bb 271 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → ((𝐹‘𝐴) ∈ 𝐵 ↔ (𝐹 “ {𝐴}) ⊆ 𝐵)) |
14 | 3, 13 | mpbird 246 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → (𝐹‘𝐴) ∈ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ∈ wcel 1977 ⊆ wss 3540 {csn 4125 ◡ccnv 5037 dom cdm 5038 “ cima 5041 Fun wfun 5798 Fn wfn 5799 ‘cfv 5804 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fn 5807 df-fv 5812 |
This theorem is referenced by: fvimacnv 6240 elpreima 6245 iinpreima 6253 lmhmpreima 18869 mpfind 19357 ofco2 20076 carsggect 29707 |
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