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| Mirrors > Home > ILE Home > Th. List > fnmpo | GIF version | ||
| Description: Functionality and domain of a class given by the maps-to notation. (Contributed by FL, 17-May-2010.) | 
| Ref | Expression | 
|---|---|
| fmpo.1 | ⊢ 𝐹 = (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶) | 
| Ref | Expression | 
|---|---|
| fnmpo | ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝐶 ∈ 𝑉 → 𝐹 Fn (𝐴 × 𝐵)) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | elex 2774 | . . . 4 ⊢ (𝐶 ∈ 𝑉 → 𝐶 ∈ V) | |
| 2 | 1 | ralimi 2560 | . . 3 ⊢ (∀𝑦 ∈ 𝐵 𝐶 ∈ 𝑉 → ∀𝑦 ∈ 𝐵 𝐶 ∈ V) | 
| 3 | 2 | ralimi 2560 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝐶 ∈ 𝑉 → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝐶 ∈ V) | 
| 4 | fmpo.1 | . . . 4 ⊢ 𝐹 = (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶) | |
| 5 | 4 | fmpo 6259 | . . 3 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝐶 ∈ V ↔ 𝐹:(𝐴 × 𝐵)⟶V) | 
| 6 | dffn2 5409 | . . 3 ⊢ (𝐹 Fn (𝐴 × 𝐵) ↔ 𝐹:(𝐴 × 𝐵)⟶V) | |
| 7 | 5, 6 | bitr4i 187 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝐶 ∈ V ↔ 𝐹 Fn (𝐴 × 𝐵)) | 
| 8 | 3, 7 | sylib 122 | 1 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝐶 ∈ 𝑉 → 𝐹 Fn (𝐴 × 𝐵)) | 
| Colors of variables: wff set class | 
| Syntax hints: → wi 4 = wceq 1364 ∈ wcel 2167 ∀wral 2475 Vcvv 2763 × cxp 4661 Fn wfn 5253 ⟶wf 5254 ∈ cmpo 5924 | 
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4151 ax-pow 4207 ax-pr 4242 ax-un 4468 | 
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-rab 2484 df-v 2765 df-sbc 2990 df-csb 3085 df-un 3161 df-in 3163 df-ss 3170 df-pw 3607 df-sn 3628 df-pr 3629 df-op 3631 df-uni 3840 df-iun 3918 df-br 4034 df-opab 4095 df-mpt 4096 df-id 4328 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-rn 4674 df-res 4675 df-ima 4676 df-iota 5219 df-fun 5260 df-fn 5261 df-f 5262 df-fv 5266 df-oprab 5926 df-mpo 5927 df-1st 6198 df-2nd 6199 | 
| This theorem is referenced by: fnmpoi 6261 dmmpoga 6266 fnmpoovd 6273 f1od2 6293 mpomulf 8016 divfnzn 9695 cnref1o 9725 plusffng 13008 mulgfng 13254 rhmfn 13728 scaffng 13865 hmeofn 14538 | 
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