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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 4751 | . . 3 ⊢ (𝐴 ∈ (◡𝐹 “ 𝐵) → {𝐴} ⊆ (◡𝐹 “ 𝐵)) | |
2 | funimass2 6551 | . . 3 ⊢ ((Fun 𝐹 ∧ {𝐴} ⊆ (◡𝐹 “ 𝐵)) → (𝐹 “ {𝐴}) ⊆ 𝐵) | |
3 | 1, 2 | sylan2 593 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → (𝐹 “ {𝐴}) ⊆ 𝐵) |
4 | fvex 6822 | . . . 4 ⊢ (𝐹‘𝐴) ∈ V | |
5 | 4 | snss 4729 | . . 3 ⊢ ((𝐹‘𝐴) ∈ 𝐵 ↔ {(𝐹‘𝐴)} ⊆ 𝐵) |
6 | cnvimass 6004 | . . . . . 6 ⊢ (◡𝐹 “ 𝐵) ⊆ dom 𝐹 | |
7 | 6 | sseli 3926 | . . . . 5 ⊢ (𝐴 ∈ (◡𝐹 “ 𝐵) → 𝐴 ∈ dom 𝐹) |
8 | funfn 6498 | . . . . . 6 ⊢ (Fun 𝐹 ↔ 𝐹 Fn dom 𝐹) | |
9 | fnsnfv 6884 | . . . . . 6 ⊢ ((𝐹 Fn dom 𝐹 ∧ 𝐴 ∈ dom 𝐹) → {(𝐹‘𝐴)} = (𝐹 “ {𝐴})) | |
10 | 8, 9 | sylanb 581 | . . . . 5 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → {(𝐹‘𝐴)} = (𝐹 “ {𝐴})) |
11 | 7, 10 | sylan2 593 | . . . 4 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → {(𝐹‘𝐴)} = (𝐹 “ {𝐴})) |
12 | 11 | sseq1d 3961 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → ({(𝐹‘𝐴)} ⊆ 𝐵 ↔ (𝐹 “ {𝐴}) ⊆ 𝐵)) |
13 | 5, 12 | bitrid 282 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → ((𝐹‘𝐴) ∈ 𝐵 ↔ (𝐹 “ {𝐴}) ⊆ 𝐵)) |
14 | 3, 13 | mpbird 256 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (◡𝐹 “ 𝐵)) → (𝐹‘𝐴) ∈ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1540 ∈ wcel 2105 ⊆ wss 3896 {csn 4569 ◡ccnv 5604 dom cdm 5605 “ cima 5608 Fun wfun 6457 Fn wfn 6458 ‘cfv 6463 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-12 2170 ax-ext 2708 ax-sep 5236 ax-nul 5243 ax-pr 5365 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2815 df-ne 2942 df-ral 3063 df-rex 3072 df-rab 3405 df-v 3443 df-dif 3899 df-un 3901 df-in 3903 df-ss 3913 df-nul 4267 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4849 df-br 5086 df-opab 5148 df-id 5505 df-xp 5611 df-rel 5612 df-cnv 5613 df-co 5614 df-dm 5615 df-rn 5616 df-res 5617 df-ima 5618 df-iota 6415 df-fun 6465 df-fn 6466 df-fv 6471 |
This theorem is referenced by: fvimacnv 6967 elpreima 6972 iinpreima 6983 lmhmpreima 20381 mpfind 21388 ofco2 21671 carsggect 32391 bj-fvimacnv0 35517 fcores 44820 |
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