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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 4230 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∩ (Base‘𝑊)) ∈ V) | |
| 4 | 2, 3 | syl 14 | . . 3 ⊢ (𝜑 → (𝐴 ∩ (Base‘𝑊)) ∈ V) |
| 5 | baseslid 13201 | . . . 4 ⊢ (Base = Slot (Base‘ndx) ∧ (Base‘ndx) ∈ ℕ) | |
| 6 | 5 | setsslid 13194 | . . 3 ⊢ ((𝑊 ∈ 𝑋 ∧ (𝐴 ∩ (Base‘𝑊)) ∈ V) → (𝐴 ∩ (Base‘𝑊)) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉))) |
| 7 | 1, 4, 6 | syl2anc 411 | . 2 ⊢ (𝜑 → (𝐴 ∩ (Base‘𝑊)) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉))) |
| 8 | ressbasd.b | . . 3 ⊢ (𝜑 → 𝐵 = (Base‘𝑊)) | |
| 9 | 8 | ineq2d 3410 | . 2 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (𝐴 ∩ (Base‘𝑊))) |
| 10 | ressbasd.r | . . . 4 ⊢ (𝜑 → 𝑅 = (𝑊 ↾s 𝐴)) | |
| 11 | ressvalsets 13208 | . . . . 5 ⊢ ((𝑊 ∈ 𝑋 ∧ 𝐴 ∈ 𝑉) → (𝑊 ↾s 𝐴) = (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉)) | |
| 12 | 1, 2, 11 | syl2anc 411 | . . . 4 ⊢ (𝜑 → (𝑊 ↾s 𝐴) = (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉)) |
| 13 | 10, 12 | eqtrd 2264 | . . 3 ⊢ (𝜑 → 𝑅 = (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉)) |
| 14 | 13 | fveq2d 5652 | . 2 ⊢ (𝜑 → (Base‘𝑅) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉))) |
| 15 | 7, 9, 14 | 3eqtr4d 2274 | 1 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2202 Vcvv 2803 ∩ cin 3200 〈cop 3676 ‘cfv 5333 (class class class)co 6028 ndxcnx 13140 sSet csts 13141 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-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: ressbas2d 13212 ressbasssd 13213 ressbasid 13214 ressressg 13219 grpressid 13705 opprsubgg 14159 subrngpropd 14292 subrgpropd 14329 sralmod 14526 lidlbas 14554 |
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