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| Mirrors > Home > ILE Home > Th. List > ressbasd | GIF version | ||
| Description: Base set of a structure restriction. (Contributed by Stefan O'Rear, 26-Nov-2014.) (Proof shortened by AV, 7-Nov-2024.) |
| Ref | Expression |
|---|---|
| ressbasd.r | ⊢ (𝜑 → 𝑅 = (𝑊 ↾s 𝐴)) |
| ressbasd.b | ⊢ (𝜑 → 𝐵 = (Base‘𝑊)) |
| ressbasd.w | ⊢ (𝜑 → 𝑊 ∈ 𝑋) |
| ressbasd.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| ressbasd | ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ressbasd.w | . . 3 ⊢ (𝜑 → 𝑊 ∈ 𝑋) | |
| 2 | ressbasd.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
| 3 | inex1g 4267 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∩ (Base‘𝑊)) ∈ V) | |
| 4 | 2, 3 | syl 14 | . . 3 ⊢ (𝜑 → (𝐴 ∩ (Base‘𝑊)) ∈ V) |
| 5 | baseslid 13393 | . . . 4 ⊢ (Base = Slot (Base‘ndx) ∧ (Base‘ndx) ∈ ℕ) | |
| 6 | 5 | setsslid 13386 | . . 3 ⊢ ((𝑊 ∈ 𝑋 ∧ (𝐴 ∩ (Base‘𝑊)) ∈ V) → (𝐴 ∩ (Base‘𝑊)) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉))) |
| 7 | 1, 4, 6 | syl2anc 415 | . 2 ⊢ (𝜑 → (𝐴 ∩ (Base‘𝑊)) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉))) |
| 8 | ressbasd.b | . . 3 ⊢ (𝜑 → 𝐵 = (Base‘𝑊)) | |
| 9 | 8 | ineq2d 3432 | . 2 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (𝐴 ∩ (Base‘𝑊))) |
| 10 | ressbasd.r | . . . 4 ⊢ (𝜑 → 𝑅 = (𝑊 ↾s 𝐴)) | |
| 11 | ressvalsets 13401 | . . . . 5 ⊢ ((𝑊 ∈ 𝑋 ∧ 𝐴 ∈ 𝑉) → (𝑊 ↾s 𝐴) = (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉)) | |
| 12 | 1, 2, 11 | syl2anc 415 | . . . 4 ⊢ (𝜑 → (𝑊 ↾s 𝐴) = (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉)) |
| 13 | 10, 12 | eqtrd 2271 | . . 3 ⊢ (𝜑 → 𝑅 = (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉)) |
| 14 | 13 | fveq2d 5697 | . 2 ⊢ (𝜑 → (Base‘𝑅) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉))) |
| 15 | 7, 9, 14 | 3eqtr4d 2281 | 1 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1402 ∈ wcel 2209 Vcvv 2821 ∩ cin 3219 〈cop 3711 ‘cfv 5375 (class class class)co 6079 ndxcnx 13332 sSet csts 13333 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-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: ressbas2d 13405 ressbasssd 13406 ressbasid 13407 ressressg 13412 grpressid 13849 opprsubgg 14373 subrngpropd 14507 subrgpropd 14544 sralmod 14770 lidlbas 14798 |
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