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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 3214 | . . 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 13202 | . . . . . 6 ⊢ Base Fn V | |
| 8 | 6 | elexd 2817 | . . . . . 6 ⊢ (𝜑 → 𝑊 ∈ V) |
| 9 | funfvex 5665 | . . . . . . 7 ⊢ ((Fun Base ∧ 𝑊 ∈ dom Base) → (Base‘𝑊) ∈ V) | |
| 10 | 9 | funfni 5439 | . . . . . 6 ⊢ ((Base Fn V ∧ 𝑊 ∈ V) → (Base‘𝑊) ∈ V) |
| 11 | 7, 8, 10 | sylancr 414 | . . . . 5 ⊢ (𝜑 → (Base‘𝑊) ∈ V) |
| 12 | 5, 11 | eqeltrd 2308 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ V) |
| 13 | 12, 1 | ssexd 4234 | . . 3 ⊢ (𝜑 → 𝐴 ∈ V) |
| 14 | 4, 5, 6, 13 | ressbasd 13211 | . 2 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 15 | 3, 14 | eqtr3d 2266 | 1 ⊢ (𝜑 → 𝐴 = (Base‘𝑅)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2202 Vcvv 2803 ∩ cin 3200 ⊆ wss 3201 Fn wfn 5328 ‘cfv 5333 (class class class)co 6028 Basecbs 13143 ↾s cress 13144 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-cnex 8166 ax-resscn 8167 ax-1re 8169 ax-addrcl 8172 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-sbc 3033 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-br 4094 df-opab 4156 df-mpt 4157 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-iota 5293 df-fun 5335 df-fn 5336 df-fv 5341 df-ov 6031 df-oprab 6032 df-mpo 6033 df-inn 9187 df-ndx 13146 df-slot 13147 df-base 13149 df-sets 13150 df-iress 13151 |
| This theorem is referenced by: gsumress 13539 issubmnd 13586 ress0g 13587 submbas 13625 resmhm 13631 subgbas 13826 issubg2m 13837 resghm 13908 ablressid 13983 rngressid 14029 ringidss 14104 ringressid 14138 unitgrpbasd 14191 islss3 14455 lsslss 14457 lsslsp 14505 2idlbas 14591 zringbas 14672 expghmap 14683 mplbascoe 14772 |
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