![]() |
Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > ILE Home > Th. List > ressbasid | GIF version |
Description: The trivial structure restriction leaves the base set unchanged. (Contributed by Jim Kingdon, 29-Apr-2025.) |
Ref | Expression |
---|---|
ressbasid.b | ⊢ 𝐵 = (Base‘𝑊) |
Ref | Expression |
---|---|
ressbasid | ⊢ (𝑊 ∈ 𝑉 → (Base‘(𝑊 ↾s 𝐵)) = 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqidd 2194 | . . 3 ⊢ (𝑊 ∈ 𝑉 → (𝑊 ↾s 𝐵) = (𝑊 ↾s 𝐵)) | |
2 | ressbasid.b | . . . 4 ⊢ 𝐵 = (Base‘𝑊) | |
3 | 2 | a1i 9 | . . 3 ⊢ (𝑊 ∈ 𝑉 → 𝐵 = (Base‘𝑊)) |
4 | id 19 | . . 3 ⊢ (𝑊 ∈ 𝑉 → 𝑊 ∈ 𝑉) | |
5 | basfn 12679 | . . . . 5 ⊢ Base Fn V | |
6 | elex 2771 | . . . . 5 ⊢ (𝑊 ∈ 𝑉 → 𝑊 ∈ V) | |
7 | funfvex 5572 | . . . . . 6 ⊢ ((Fun Base ∧ 𝑊 ∈ dom Base) → (Base‘𝑊) ∈ V) | |
8 | 7 | funfni 5355 | . . . . 5 ⊢ ((Base Fn V ∧ 𝑊 ∈ V) → (Base‘𝑊) ∈ V) |
9 | 5, 6, 8 | sylancr 414 | . . . 4 ⊢ (𝑊 ∈ 𝑉 → (Base‘𝑊) ∈ V) |
10 | 2, 9 | eqeltrid 2280 | . . 3 ⊢ (𝑊 ∈ 𝑉 → 𝐵 ∈ V) |
11 | 1, 3, 4, 10 | ressbasd 12688 | . 2 ⊢ (𝑊 ∈ 𝑉 → (𝐵 ∩ 𝐵) = (Base‘(𝑊 ↾s 𝐵))) |
12 | inidm 3369 | . 2 ⊢ (𝐵 ∩ 𝐵) = 𝐵 | |
13 | 11, 12 | eqtr3di 2241 | 1 ⊢ (𝑊 ∈ 𝑉 → (Base‘(𝑊 ↾s 𝐵)) = 𝐵) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1364 ∈ wcel 2164 Vcvv 2760 ∩ cin 3153 Fn wfn 5250 ‘cfv 5255 (class class class)co 5919 Basecbs 12621 ↾s cress 12622 |
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 4148 ax-pow 4204 ax-pr 4239 ax-un 4465 ax-setind 4570 ax-cnex 7965 ax-resscn 7966 ax-1re 7968 ax-addrcl 7971 |
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 2987 df-dif 3156 df-un 3158 df-in 3160 df-ss 3167 df-nul 3448 df-pw 3604 df-sn 3625 df-pr 3626 df-op 3628 df-uni 3837 df-int 3872 df-br 4031 df-opab 4092 df-mpt 4093 df-id 4325 df-xp 4666 df-rel 4667 df-cnv 4668 df-co 4669 df-dm 4670 df-rn 4671 df-res 4672 df-iota 5216 df-fun 5257 df-fn 5258 df-fv 5263 df-ov 5922 df-oprab 5923 df-mpo 5924 df-inn 8985 df-ndx 12624 df-slot 12625 df-base 12627 df-sets 12628 df-iress 12629 |
This theorem is referenced by: rlmscabas 13959 |
Copyright terms: Public domain | W3C validator |