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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 4747 | . . 3 ⊢ (𝐴 ∈ (◡𝐹 “ 𝐵) → {𝐴} ⊆ (◡𝐹 “ 𝐵)) | |
2 | funimass2 6546 | . . 3 ⊢ ((Fun 𝐹 ∧ {𝐴} ⊆ (◡𝐹 “ 𝐵)) → (𝐹 “ {𝐴}) ⊆ 𝐵) | |
3 | 1, 2 | sylan2 594 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → (𝐹 “ {𝐴}) ⊆ 𝐵) |
4 | fvex 6817 | . . . 4 ⊢ (𝐹‘𝐴) ∈ V | |
5 | 4 | snss 4725 | . . 3 ⊢ ((𝐹‘𝐴) ∈ 𝐵 ↔ {(𝐹‘𝐴)} ⊆ 𝐵) |
6 | cnvimass 5999 | . . . . . 6 ⊢ (◡𝐹 “ 𝐵) ⊆ dom 𝐹 | |
7 | 6 | sseli 3922 | . . . . 5 ⊢ (𝐴 ∈ (◡𝐹 “ 𝐵) → 𝐴 ∈ dom 𝐹) |
8 | funfn 6493 | . . . . . 6 ⊢ (Fun 𝐹 ↔ 𝐹 Fn dom 𝐹) | |
9 | fnsnfv 6879 | . . . . . 6 ⊢ ((𝐹 Fn dom 𝐹 ∧ 𝐴 ∈ dom 𝐹) → {(𝐹‘𝐴)} = (𝐹 “ {𝐴})) | |
10 | 8, 9 | sylanb 582 | . . . . 5 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → {(𝐹‘𝐴)} = (𝐹 “ {𝐴})) |
11 | 7, 10 | sylan2 594 | . . . 4 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → {(𝐹‘𝐴)} = (𝐹 “ {𝐴})) |
12 | 11 | sseq1d 3957 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → ({(𝐹‘𝐴)} ⊆ 𝐵 ↔ (𝐹 “ {𝐴}) ⊆ 𝐵)) |
13 | 5, 12 | bitrid 283 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → ((𝐹‘𝐴) ∈ 𝐵 ↔ (𝐹 “ {𝐴}) ⊆ 𝐵)) |
14 | 3, 13 | mpbird 257 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → (𝐹‘𝐴) ∈ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 = wceq 1539 ∈ wcel 2104 ⊆ wss 3892 {csn 4565 ◡ccnv 5599 dom cdm 5600 “ cima 5603 Fun wfun 6452 Fn wfn 6453 ‘cfv 6458 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pr 5361 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-ne 2942 df-ral 3063 df-rex 3072 df-rab 3287 df-v 3439 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-br 5082 df-opab 5144 df-id 5500 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-iota 6410 df-fun 6460 df-fn 6461 df-fv 6466 |
This theorem is referenced by: fvimacnv 6962 elpreima 6967 iinpreima 6978 lmhmpreima 20355 mpfind 21362 ofco2 21645 carsggect 32330 bj-fvimacnv0 35501 fcores 44619 |
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