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| Mirrors > Home > ILE Home > Th. List > ixpssmap2g | GIF version | ||
| Description: An infinite Cartesian product is a subset of set exponentiation. This version of ixpssmapg 7004 avoids ax-coll 4244. (Contributed by Mario Carneiro, 16-Nov-2014.) |
| Ref | Expression |
|---|---|
| ixpssmap2g | ⊢ (∪ 𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 → X𝑥 ∈ 𝐴 𝐵 ⊆ (∪ 𝑥 ∈ 𝐴 𝐵 ↑𝑚 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ixpf 6996 | . . . . 5 ⊢ (𝑓 ∈ X𝑥 ∈ 𝐴 𝐵 → 𝑓:𝐴⟶∪ 𝑥 ∈ 𝐴 𝐵) | |
| 2 | 1 | adantl 277 | . . . 4 ⊢ ((∪ 𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 ∧ 𝑓 ∈ X𝑥 ∈ 𝐴 𝐵) → 𝑓:𝐴⟶∪ 𝑥 ∈ 𝐴 𝐵) |
| 3 | ixpfn 6980 | . . . . . 6 ⊢ (𝑓 ∈ X𝑥 ∈ 𝐴 𝐵 → 𝑓 Fn 𝐴) | |
| 4 | fndm 5478 | . . . . . . 7 ⊢ (𝑓 Fn 𝐴 → dom 𝑓 = 𝐴) | |
| 5 | vex 2824 | . . . . . . . 8 ⊢ 𝑓 ∈ V | |
| 6 | 5 | dmex 5047 | . . . . . . 7 ⊢ dom 𝑓 ∈ V |
| 7 | 4, 6 | eqeltrrdi 2330 | . . . . . 6 ⊢ (𝑓 Fn 𝐴 → 𝐴 ∈ V) |
| 8 | 3, 7 | syl 14 | . . . . 5 ⊢ (𝑓 ∈ X𝑥 ∈ 𝐴 𝐵 → 𝐴 ∈ V) |
| 9 | elmapg 6929 | . . . . 5 ⊢ ((∪ 𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 ∧ 𝐴 ∈ V) → (𝑓 ∈ (∪ 𝑥 ∈ 𝐴 𝐵 ↑𝑚 𝐴) ↔ 𝑓:𝐴⟶∪ 𝑥 ∈ 𝐴 𝐵)) | |
| 10 | 8, 9 | sylan2 286 | . . . 4 ⊢ ((∪ 𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 ∧ 𝑓 ∈ X𝑥 ∈ 𝐴 𝐵) → (𝑓 ∈ (∪ 𝑥 ∈ 𝐴 𝐵 ↑𝑚 𝐴) ↔ 𝑓:𝐴⟶∪ 𝑥 ∈ 𝐴 𝐵)) |
| 11 | 2, 10 | mpbird 167 | . . 3 ⊢ ((∪ 𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 ∧ 𝑓 ∈ X𝑥 ∈ 𝐴 𝐵) → 𝑓 ∈ (∪ 𝑥 ∈ 𝐴 𝐵 ↑𝑚 𝐴)) |
| 12 | 11 | ex 115 | . 2 ⊢ (∪ 𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 → (𝑓 ∈ X𝑥 ∈ 𝐴 𝐵 → 𝑓 ∈ (∪ 𝑥 ∈ 𝐴 𝐵 ↑𝑚 𝐴))) |
| 13 | 12 | ssrdv 3254 | 1 ⊢ (∪ 𝑥 ∈ 𝐴 𝐵 ∈ 𝑉 → X𝑥 ∈ 𝐴 𝐵 ⊆ (∪ 𝑥 ∈ 𝐴 𝐵 ↑𝑚 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2209 Vcvv 2821 ⊆ wss 3220 ∪ ciun 4010 dom cdm 4772 Fn wfn 5370 ⟶wf 5371 (class class class)co 6079 ↑𝑚 cmap 6916 Xcixp 6974 |
| 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-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4247 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-id 4436 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-fv 5383 df-ov 6082 df-oprab 6083 df-mpo 6084 df-map 6918 df-ixp 6975 |
| This theorem is referenced by: ixpssmapg 7004 prdsval 14156 |
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