Theorem strslfv 12460

Description: Extract a structure component 𝐶 (such as the base set) from a structure 𝑆 with a component extractor 𝐸 (such as the base set extractor df-base 12422). By virtue of ndxslid 12441, this can be done without having to refer to the hard-coded numeric index of 𝐸. (Contributed by Mario Carneiro, 6-Oct-2013.) (Revised by Jim Kingdon, 30-Jan-2023.)

Hypotheses

Ref	Expression
strfv.s	⊢ 𝑆 Struct 𝑋
strslfv.e	⊢ (𝐸 = Slot (𝐸‘ndx) ∧ (𝐸‘ndx) ∈ ℕ)
strfv.n	⊢ {⟨(𝐸‘ndx), 𝐶⟩} ⊆ 𝑆

Assertion

Ref	Expression
strslfv	⊢ (𝐶 ∈ 𝑉 → 𝐶 = (𝐸‘𝑆))

Proof of Theorem strslfv

Step	Hyp	Ref	Expression
1		strslfv.e	. 2 ⊢ (𝐸 = Slot (𝐸‘ndx) ∧ (𝐸‘ndx) ∈ ℕ)
2		strfv.s	. . 3 ⊢ 𝑆 Struct 𝑋
3		structex 12428	. . 3 ⊢ (𝑆 Struct 𝑋 → 𝑆 ∈ V)
4	2, 3	mp1i 10	. 2 ⊢ (𝐶 ∈ 𝑉 → 𝑆 ∈ V)
5	2	structfun 12434	. . 3 ⊢ Fun ◡◡𝑆
6	5	a1i 9	. 2 ⊢ (𝐶 ∈ 𝑉 → Fun ◡◡𝑆)
7		strfv.n	. . 3 ⊢ {⟨(𝐸‘ndx), 𝐶⟩} ⊆ 𝑆
8	1	simpri 112	. . . . 5 ⊢ (𝐸‘ndx) ∈ ℕ
9		opexg 4213	. . . . 5 ⊢ (((𝐸‘ndx) ∈ ℕ ∧ 𝐶 ∈ 𝑉) → ⟨(𝐸‘ndx), 𝐶⟩ ∈ V)
10	8, 9	mpan 422	. . . 4 ⊢ (𝐶 ∈ 𝑉 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ V)
11		snssg 3716	. . . 4 ⊢ (⟨(𝐸‘ndx), 𝐶⟩ ∈ V → (⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆 ↔ {⟨(𝐸‘ndx), 𝐶⟩} ⊆ 𝑆))
12	10, 11	syl 14	. . 3 ⊢ (𝐶 ∈ 𝑉 → (⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆 ↔ {⟨(𝐸‘ndx), 𝐶⟩} ⊆ 𝑆))
13	7, 12	mpbiri 167	. 2 ⊢ (𝐶 ∈ 𝑉 → ⟨(𝐸‘ndx), 𝐶⟩ ∈ 𝑆)
14		id 19	. 2 ⊢ (𝐶 ∈ 𝑉 → 𝐶 ∈ 𝑉)
15	1, 4, 6, 13, 14	strslfv2d 12458	1 ⊢ (𝐶 ∈ 𝑉 → 𝐶 = (𝐸‘𝑆))

Syntax hints:   → wi 4   ∧ wa 103   ↔ wb 104   = wceq 1348   ∈ wcel 2141  Vcvv 2730   ⊆ wss 3121  {csn 3583  ⟨cop 3586   class class class wbr 3989  ^◡ccnv 4610  Fun wfun 5192  ‘cfv 5198  ℕcn 8878   Struct cstr 12412  ndxcnx 12413  Slot cslot 12415

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-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418

This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-ral 2453  df-rex 2454  df-rab 2457  df-v 2732  df-sbc 2956  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-nul 3415  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-mpt 4052  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-iota 5160  df-fun 5200  df-fv 5206  df-struct 12418  df-slot 12420

This theorem is referenced by:  strslfv3  12461