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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 4165 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∩ (Base‘𝑊)) ∈ V) | |
4 | 2, 3 | syl 14 | . . 3 ⊢ (𝜑 → (𝐴 ∩ (Base‘𝑊)) ∈ V) |
5 | baseslid 12675 | . . . 4 ⊢ (Base = Slot (Base‘ndx) ∧ (Base‘ndx) ∈ ℕ) | |
6 | 5 | setsslid 12669 | . . 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 3360 | . 2 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (𝐴 ∩ (Base‘𝑊))) |
10 | ressbasd.r | . . . 4 ⊢ (𝜑 → 𝑅 = (𝑊 ↾s 𝐴)) | |
11 | ressvalsets 12682 | . . . . 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 2226 | . . 3 ⊢ (𝜑 → 𝑅 = (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉)) |
14 | 13 | fveq2d 5558 | . 2 ⊢ (𝜑 → (Base‘𝑅) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉))) |
15 | 7, 9, 14 | 3eqtr4d 2236 | 1 ⊢ (𝜑 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1364 ∈ wcel 2164 Vcvv 2760 ∩ cin 3152 〈cop 3621 ‘cfv 5254 (class class class)co 5918 ndxcnx 12615 sSet csts 12616 Basecbs 12618 ↾s cress 12619 |
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 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-sep 4147 ax-pow 4203 ax-pr 4238 ax-un 4464 ax-setind 4569 ax-cnex 7963 ax-resscn 7964 ax-1re 7966 ax-addrcl 7969 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-ral 2477 df-rex 2478 df-rab 2481 df-v 2762 df-sbc 2986 df-dif 3155 df-un 3157 df-in 3159 df-ss 3166 df-nul 3447 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-uni 3836 df-int 3871 df-br 4030 df-opab 4091 df-mpt 4092 df-id 4324 df-xp 4665 df-rel 4666 df-cnv 4667 df-co 4668 df-dm 4669 df-rn 4670 df-res 4671 df-iota 5215 df-fun 5256 df-fv 5262 df-ov 5921 df-oprab 5922 df-mpo 5923 df-inn 8983 df-ndx 12621 df-slot 12622 df-base 12624 df-sets 12625 df-iress 12626 |
This theorem is referenced by: ressbas2d 12686 ressbasssd 12687 ressbasid 12688 ressressg 12693 grpressid 13133 opprsubgg 13580 subrngpropd 13712 subrgpropd 13749 sralmod 13946 lidlbas 13974 |
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