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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 6840 avoids ax-coll 4176. (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 6832 | . . . . 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 6816 | . . . . . 6 ⊢ (𝑓 ∈ X𝑥 ∈ 𝐴 𝐵 → 𝑓 Fn 𝐴) | |
| 4 | fndm 5393 | . . . . . . 7 ⊢ (𝑓 Fn 𝐴 → dom 𝑓 = 𝐴) | |
| 5 | vex 2780 | . . . . . . . 8 ⊢ 𝑓 ∈ V | |
| 6 | 5 | dmex 4965 | . . . . . . 7 ⊢ dom 𝑓 ∈ V |
| 7 | 4, 6 | eqeltrrdi 2299 | . . . . . 6 ⊢ (𝑓 Fn 𝐴 → 𝐴 ∈ V) |
| 8 | 3, 7 | syl 14 | . . . . 5 ⊢ (𝑓 ∈ X𝑥 ∈ 𝐴 𝐵 → 𝐴 ∈ V) |
| 9 | elmapg 6773 | . . . . 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 3208 | 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 2178 Vcvv 2777 ⊆ wss 3175 ∪ ciun 3942 dom cdm 4694 Fn wfn 5286 ⟶wf 5287 (class class class)co 5969 ↑𝑚 cmap 6760 Xcixp 6810 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-sep 4179 ax-pow 4235 ax-pr 4270 ax-un 4499 ax-setind 4604 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ne 2379 df-ral 2491 df-rex 2492 df-v 2779 df-sbc 3007 df-dif 3177 df-un 3179 df-in 3181 df-ss 3188 df-pw 3629 df-sn 3650 df-pr 3651 df-op 3653 df-uni 3866 df-iun 3944 df-br 4061 df-opab 4123 df-mpt 4124 df-id 4359 df-xp 4700 df-rel 4701 df-cnv 4702 df-co 4703 df-dm 4704 df-rn 4705 df-iota 5252 df-fun 5293 df-fn 5294 df-f 5295 df-fv 5299 df-ov 5972 df-oprab 5973 df-mpo 5974 df-map 6762 df-ixp 6811 |
| This theorem is referenced by: ixpssmapg 6840 prdsval 13266 |
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