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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 3227 | . . 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 13355 | . . . . . 6 ⊢ Base Fn V | |
| 8 | 6 | elexd 2829 | . . . . . 6 ⊢ (𝜑 → 𝑊 ∈ V) |
| 9 | funfvex 5692 | . . . . . . 7 ⊢ ((Fun Base ∧ 𝑊 ∈ dom Base) → (Base‘𝑊) ∈ V) | |
| 10 | 9 | funfni 5463 | . . . . . 6 ⊢ ((Base Fn V ∧ 𝑊 ∈ V) → (Base‘𝑊) ∈ V) |
| 11 | 7, 8, 10 | sylancr 414 | . . . . 5 ⊢ (𝜑 → (Base‘𝑊) ∈ V) |
| 12 | 5, 11 | eqeltrd 2311 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ V) |
| 13 | 12, 1 | ssexd 4255 | . . 3 ⊢ (𝜑 → 𝐴 ∈ V) |
| 14 | 4, 5, 6, 13 | ressbasd 13364 | . 2 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 15 | 3, 14 | eqtr3d 2269 | 1 ⊢ (𝜑 → 𝐴 = (Base‘𝑅)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2205 Vcvv 2815 ∩ cin 3213 ⊆ wss 3214 Fn wfn 5352 ‘cfv 5357 (class class class)co 6058 Basecbs 13296 ↾s cress 13297 |
| 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 2207 ax-14 2208 ax-ext 2216 ax-sep 4233 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-cnex 8234 ax-resscn 8235 ax-1re 8237 ax-addrcl 8240 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-ral 2527 df-rex 2528 df-rab 2531 df-v 2817 df-sbc 3046 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-nul 3513 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-int 3955 df-br 4115 df-opab 4177 df-mpt 4178 df-id 4419 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-iota 5317 df-fun 5359 df-fn 5360 df-fv 5365 df-ov 6061 df-oprab 6062 df-mpo 6063 df-inn 9255 df-ndx 13299 df-slot 13300 df-base 13302 df-sets 13303 df-iress 13304 |
| This theorem is referenced by: gsumress 13692 issubmnd 13739 ress0g 13740 submbas 13778 resmhm 13784 subgbas 13979 issubg2m 13990 resghm 14061 ablressid 14136 rngressid 14182 ringidss 14257 ringressid 14291 unitgrpbasd 14345 islss3 14639 lsslss 14641 lsslsp 14689 2idlbas 14775 zringbas 14856 expghmap 14867 mplbascoe 14958 |
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