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Mirrors > Home > ILE Home > Th. List > strnfvn | GIF version |
Description: Value of a structure
component extractor 𝐸. Normally, 𝐸 is a
defined constant symbol such as Base (df-base 11954) and 𝑁 is a
fixed integer such as 1. 𝑆 is a structure, i.e. a
specific
member of a class of structures.
Note: Normally, this theorem shouldn't be used outside of this section, because it requires hard-coded index values. Instead, use strslfv 11992. (Contributed by NM, 9-Sep-2011.) (Revised by Jim Kingdon, 19-Jan-2023.) (New usage is discouraged.) |
Ref | Expression |
---|---|
strnfvn.f | ⊢ 𝑆 ∈ V |
strnfvn.c | ⊢ 𝐸 = Slot 𝑁 |
strnfvn.n | ⊢ 𝑁 ∈ ℕ |
Ref | Expression |
---|---|
strnfvn | ⊢ (𝐸‘𝑆) = (𝑆‘𝑁) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | strnfvn.c | . . 3 ⊢ 𝐸 = Slot 𝑁 | |
2 | strnfvn.f | . . . 4 ⊢ 𝑆 ∈ V | |
3 | 2 | a1i 9 | . . 3 ⊢ (⊤ → 𝑆 ∈ V) |
4 | strnfvn.n | . . . 4 ⊢ 𝑁 ∈ ℕ | |
5 | 4 | a1i 9 | . . 3 ⊢ (⊤ → 𝑁 ∈ ℕ) |
6 | 1, 3, 5 | strnfvnd 11968 | . 2 ⊢ (⊤ → (𝐸‘𝑆) = (𝑆‘𝑁)) |
7 | 6 | mptru 1340 | 1 ⊢ (𝐸‘𝑆) = (𝑆‘𝑁) |
Colors of variables: wff set class |
Syntax hints: = wceq 1331 ⊤wtru 1332 ∈ wcel 1480 Vcvv 2681 ‘cfv 5118 ℕcn 8713 Slot cslot 11947 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 ax-un 4350 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rex 2420 df-v 2683 df-sbc 2905 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-br 3925 df-opab 3985 df-mpt 3986 df-id 4210 df-xp 4540 df-rel 4541 df-cnv 4542 df-co 4543 df-dm 4544 df-rn 4545 df-iota 5083 df-fun 5120 df-fv 5126 df-slot 11952 |
This theorem is referenced by: ndxarg 11971 strsl0 11996 baseval 12000 |
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