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Mirrors > Home > ILE Home > Th. List > ssrest | GIF version |
Description: If 𝐾 is a finer topology than 𝐽, then the subspace topologies induced by 𝐴 maintain this relationship. (Contributed by Mario Carneiro, 21-Mar-2015.) (Revised by Mario Carneiro, 1-May-2015.) |
Ref | Expression |
---|---|
ssrest | ⊢ ((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) → (𝐽 ↾t 𝐴) ⊆ (𝐾 ↾t 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpr 109 | . . . 4 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) ∧ 𝑥 ∈ (𝐽 ↾t 𝐴)) → 𝑥 ∈ (𝐽 ↾t 𝐴)) | |
2 | ssrexv 3212 | . . . . . 6 ⊢ (𝐽 ⊆ 𝐾 → (∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴) → ∃𝑦 ∈ 𝐾 𝑥 = (𝑦 ∩ 𝐴))) | |
3 | 2 | ad2antlr 486 | . . . . 5 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) ∧ 𝑥 ∈ (𝐽 ↾t 𝐴)) → (∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴) → ∃𝑦 ∈ 𝐾 𝑥 = (𝑦 ∩ 𝐴))) |
4 | df-rest 12581 | . . . . . . . 8 ⊢ ↾t = (𝑗 ∈ V, 𝑥 ∈ V ↦ ran (𝑦 ∈ 𝑗 ↦ (𝑦 ∩ 𝑥))) | |
5 | 4 | elmpocl 6047 | . . . . . . 7 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → (𝐽 ∈ V ∧ 𝐴 ∈ V)) |
6 | 5 | adantl 275 | . . . . . 6 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) ∧ 𝑥 ∈ (𝐽 ↾t 𝐴)) → (𝐽 ∈ V ∧ 𝐴 ∈ V)) |
7 | elrest 12586 | . . . . . 6 ⊢ ((𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝑥 ∈ (𝐽 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴))) | |
8 | 6, 7 | syl 14 | . . . . 5 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) ∧ 𝑥 ∈ (𝐽 ↾t 𝐴)) → (𝑥 ∈ (𝐽 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴))) |
9 | simpll 524 | . . . . . 6 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) ∧ 𝑥 ∈ (𝐽 ↾t 𝐴)) → 𝐾 ∈ 𝑉) | |
10 | 6 | simprd 113 | . . . . . 6 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) ∧ 𝑥 ∈ (𝐽 ↾t 𝐴)) → 𝐴 ∈ V) |
11 | elrest 12586 | . . . . . 6 ⊢ ((𝐾 ∈ 𝑉 ∧ 𝐴 ∈ V) → (𝑥 ∈ (𝐾 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐾 𝑥 = (𝑦 ∩ 𝐴))) | |
12 | 9, 10, 11 | syl2anc 409 | . . . . 5 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) ∧ 𝑥 ∈ (𝐽 ↾t 𝐴)) → (𝑥 ∈ (𝐾 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐾 𝑥 = (𝑦 ∩ 𝐴))) |
13 | 3, 8, 12 | 3imtr4d 202 | . . . 4 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) ∧ 𝑥 ∈ (𝐽 ↾t 𝐴)) → (𝑥 ∈ (𝐽 ↾t 𝐴) → 𝑥 ∈ (𝐾 ↾t 𝐴))) |
14 | 1, 13 | mpd 13 | . . 3 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) ∧ 𝑥 ∈ (𝐽 ↾t 𝐴)) → 𝑥 ∈ (𝐾 ↾t 𝐴)) |
15 | 14 | ex 114 | . 2 ⊢ ((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) → (𝑥 ∈ (𝐽 ↾t 𝐴) → 𝑥 ∈ (𝐾 ↾t 𝐴))) |
16 | 15 | ssrdv 3153 | 1 ⊢ ((𝐾 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐾) → (𝐽 ↾t 𝐴) ⊆ (𝐾 ↾t 𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1348 ∈ wcel 2141 ∃wrex 2449 Vcvv 2730 ∩ cin 3120 ⊆ wss 3121 ↦ cmpt 4050 ran crn 4612 (class class class)co 5853 ↾t crest 12579 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4104 ax-sep 4107 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-ral 2453 df-rex 2454 df-reu 2455 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-iun 3875 df-br 3990 df-opab 4051 df-mpt 4052 df-id 4278 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-res 4623 df-ima 4624 df-iota 5160 df-fun 5200 df-fn 5201 df-f 5202 df-f1 5203 df-fo 5204 df-f1o 5205 df-fv 5206 df-ov 5856 df-oprab 5857 df-mpo 5858 df-rest 12581 |
This theorem is referenced by: (None) |
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