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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 3223 | . . 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 13263 | . . . . . 6 ⊢ Base Fn V | |
| 8 | 6 | elexd 2826 | . . . . . 6 ⊢ (𝜑 → 𝑊 ∈ V) |
| 9 | funfvex 5686 | . . . . . . 7 ⊢ ((Fun Base ∧ 𝑊 ∈ dom Base) → (Base‘𝑊) ∈ V) | |
| 10 | 9 | funfni 5457 | . . . . . 6 ⊢ ((Base Fn V ∧ 𝑊 ∈ V) → (Base‘𝑊) ∈ V) |
| 11 | 7, 8, 10 | sylancr 414 | . . . . 5 ⊢ (𝜑 → (Base‘𝑊) ∈ V) |
| 12 | 5, 11 | eqeltrd 2309 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ V) |
| 13 | 12, 1 | ssexd 4249 | . . 3 ⊢ (𝜑 → 𝐴 ∈ V) |
| 14 | 4, 5, 6, 13 | ressbasd 13272 | . 2 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 15 | 3, 14 | eqtr3d 2267 | 1 ⊢ (𝜑 → 𝐴 = (Base‘𝑅)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2203 Vcvv 2812 ∩ cin 3209 ⊆ wss 3210 Fn wfn 5346 ‘cfv 5351 (class class class)co 6049 Basecbs 13204 ↾s cress 13205 |
| 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 2205 ax-14 2206 ax-ext 2214 ax-sep 4227 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-cnex 8217 ax-resscn 8218 ax-1re 8220 ax-addrcl 8223 |
| 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 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2814 df-sbc 3042 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-nul 3508 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-int 3949 df-br 4109 df-opab 4171 df-mpt 4172 df-id 4413 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-iota 5311 df-fun 5353 df-fn 5354 df-fv 5359 df-ov 6052 df-oprab 6053 df-mpo 6054 df-inn 9237 df-ndx 13207 df-slot 13208 df-base 13210 df-sets 13211 df-iress 13212 |
| This theorem is referenced by: gsumress 13600 issubmnd 13647 ress0g 13648 submbas 13686 resmhm 13692 subgbas 13887 issubg2m 13898 resghm 13969 ablressid 14044 rngressid 14090 ringidss 14165 ringressid 14199 unitgrpbasd 14252 islss3 14519 lsslss 14521 lsslsp 14569 2idlbas 14655 zringbas 14736 expghmap 14747 mplbascoe 14838 |
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