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| Mirrors > Home > ILE Home > Th. List > ressbas2d | GIF version | ||
| Description: Base set of a structure restriction. (Contributed by Mario Carneiro, 2-Dec-2014.) |
| Ref | Expression |
|---|---|
| ressbasd.r | ⊢ (𝜑 → 𝑅 = (𝑊 ↾s 𝐴)) |
| ressbasd.b | ⊢ (𝜑 → 𝐵 = (Base‘𝑊)) |
| ressbasd.w | ⊢ (𝜑 → 𝑊 ∈ 𝑋) |
| ressbas2d.ss | ⊢ (𝜑 → 𝐴 ⊆ 𝐵) |
| Ref | Expression |
|---|---|
| ressbas2d | ⊢ (𝜑 → 𝐴 = (Base‘𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ressbas2d.ss | . . 3 ⊢ (𝜑 → 𝐴 ⊆ 𝐵) | |
| 2 | df-ss 3233 | . . 3 ⊢ (𝐴 ⊆ 𝐵 ↔ (𝐴 ∩ 𝐵) = 𝐴) | |
| 3 | 1, 2 | sylib 122 | . 2 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = 𝐴) |
| 4 | ressbasd.r | . . 3 ⊢ (𝜑 → 𝑅 = (𝑊 ↾s 𝐴)) | |
| 5 | ressbasd.b | . . 3 ⊢ (𝜑 → 𝐵 = (Base‘𝑊)) | |
| 6 | ressbasd.w | . . 3 ⊢ (𝜑 → 𝑊 ∈ 𝑋) | |
| 7 | basfn 13394 | . . . . . 6 ⊢ Base Fn V | |
| 8 | 6 | elexd 2835 | . . . . . 6 ⊢ (𝜑 → 𝑊 ∈ V) |
| 9 | funfvex 5710 | . . . . . . 7 ⊢ ((Fun Base ∧ 𝑊 ∈ dom Base) → (Base‘𝑊) ∈ V) | |
| 10 | 9 | funfni 5481 | . . . . . 6 ⊢ ((Base Fn V ∧ 𝑊 ∈ V) → (Base‘𝑊) ∈ V) |
| 11 | 7, 8, 10 | sylancr 418 | . . . . 5 ⊢ (𝜑 → (Base‘𝑊) ∈ V) |
| 12 | 5, 11 | eqeltrd 2315 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ V) |
| 13 | 12, 1 | ssexd 4271 | . . 3 ⊢ (𝜑 → 𝐴 ∈ V) |
| 14 | 4, 5, 6, 13 | ressbasd 13404 | . 2 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 15 | 3, 14 | eqtr3d 2273 | 1 ⊢ (𝜑 → 𝐴 = (Base‘𝑅)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1402 ∈ wcel 2209 Vcvv 2821 ∩ cin 3219 ⊆ wss 3220 Fn wfn 5370 ‘cfv 5375 (class class class)co 6079 Basecbs 13335 ↾s cress 13336 |
| 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 ax-cnex 8264 ax-resscn 8265 ax-1re 8267 ax-addrcl 8270 |
| 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-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 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-res 4784 df-iota 5335 df-fun 5377 df-fn 5378 df-fv 5383 df-ov 6082 df-oprab 6083 df-mpo 6084 df-inn 9288 df-ndx 13338 df-slot 13339 df-base 13341 df-sets 13342 df-iress 13343 |
| This theorem is referenced by: gzsumress 13695 issubmnd 13738 ress0g 13739 submbas 13771 resmhm 13777 subgbas 13964 issubg2m 13975 resghm 14046 ablressid 14122 gsumressfi 14150 rngressid 14236 ringidss 14317 ringressid 14351 unitgrpbasd 14405 islss3 14699 lsslss 14701 lsslsp 14749 2idlbas 14835 zringbas 14914 expghmap 14925 mplbascoe 15065 |
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