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| Mirrors > Home > ILE Home > Th. List > fabexg | GIF version | ||
| Description: Existence of a set of functions. (Contributed by Paul Chapman, 25-Feb-2008.) |
| Ref | Expression |
|---|---|
| fabexg.1 | ⊢ 𝐹 = {𝑥 ∣ (𝑥:𝐴⟶𝐵 ∧ 𝜑)} |
| Ref | Expression |
|---|---|
| fabexg | ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → 𝐹 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpexg 4840 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴 × 𝐵) ∈ V) | |
| 2 | pwexg 4270 | . 2 ⊢ ((𝐴 × 𝐵) ∈ V → 𝒫 (𝐴 × 𝐵) ∈ V) | |
| 3 | fabexg.1 | . . . . 5 ⊢ 𝐹 = {𝑥 ∣ (𝑥:𝐴⟶𝐵 ∧ 𝜑)} | |
| 4 | fssxp 5502 | . . . . . . . 8 ⊢ (𝑥:𝐴⟶𝐵 → 𝑥 ⊆ (𝐴 × 𝐵)) | |
| 5 | velpw 3659 | . . . . . . . 8 ⊢ (𝑥 ∈ 𝒫 (𝐴 × 𝐵) ↔ 𝑥 ⊆ (𝐴 × 𝐵)) | |
| 6 | 4, 5 | sylibr 134 | . . . . . . 7 ⊢ (𝑥:𝐴⟶𝐵 → 𝑥 ∈ 𝒫 (𝐴 × 𝐵)) |
| 7 | 6 | anim1i 340 | . . . . . 6 ⊢ ((𝑥:𝐴⟶𝐵 ∧ 𝜑) → (𝑥 ∈ 𝒫 (𝐴 × 𝐵) ∧ 𝜑)) |
| 8 | 7 | ss2abi 3299 | . . . . 5 ⊢ {𝑥 ∣ (𝑥:𝐴⟶𝐵 ∧ 𝜑)} ⊆ {𝑥 ∣ (𝑥 ∈ 𝒫 (𝐴 × 𝐵) ∧ 𝜑)} |
| 9 | 3, 8 | eqsstri 3259 | . . . 4 ⊢ 𝐹 ⊆ {𝑥 ∣ (𝑥 ∈ 𝒫 (𝐴 × 𝐵) ∧ 𝜑)} |
| 10 | ssab2 3311 | . . . 4 ⊢ {𝑥 ∣ (𝑥 ∈ 𝒫 (𝐴 × 𝐵) ∧ 𝜑)} ⊆ 𝒫 (𝐴 × 𝐵) | |
| 11 | 9, 10 | sstri 3236 | . . 3 ⊢ 𝐹 ⊆ 𝒫 (𝐴 × 𝐵) |
| 12 | ssexg 4228 | . . 3 ⊢ ((𝐹 ⊆ 𝒫 (𝐴 × 𝐵) ∧ 𝒫 (𝐴 × 𝐵) ∈ V) → 𝐹 ∈ V) | |
| 13 | 11, 12 | mpan 424 | . 2 ⊢ (𝒫 (𝐴 × 𝐵) ∈ V → 𝐹 ∈ V) |
| 14 | 1, 2, 13 | 3syl 17 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → 𝐹 ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1397 ∈ wcel 2202 {cab 2217 Vcvv 2802 ⊆ wss 3200 𝒫 cpw 3652 × cxp 4723 ⟶wf 5322 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-xp 4731 df-rel 4732 df-cnv 4733 df-dm 4735 df-rn 4736 df-fun 5328 df-fn 5329 df-f 5330 |
| This theorem is referenced by: fabex 5525 f1oabexg 5595 |
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