Theorem 2strbasg 13226

Description: The base set of a constructed two-slot structure. (Contributed by Mario Carneiro, 29-Aug-2015.) (Revised by Jim Kingdon, 28-Jan-2023.)

Hypotheses

Ref	Expression
2str.g	⊢ 𝐺 = {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩}
2str.e	⊢ 𝐸 = Slot 𝑁
2str.l	⊢ 1 < 𝑁
2str.n	⊢ 𝑁 ∈ ℕ

Assertion

Ref	Expression
2strbasg	⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → 𝐵 = (Base‘𝐺))

Proof of Theorem 2strbasg

Step	Hyp	Ref	Expression
1		baseslid 13163	. 2 ⊢ (Base = Slot (Base‘ndx) ∧ (Base‘ndx) ∈ ℕ)
2		2str.g	. . 3 ⊢ 𝐺 = {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩}
3		basendxnn 13161	. . . . . 6 ⊢ (Base‘ndx) ∈ ℕ
4	3	a1i 9	. . . . 5 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → (Base‘ndx) ∈ ℕ)
5		simpl 109	. . . . 5 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → 𝐵 ∈ 𝑉)
6		opexg 4322	. . . . 5 ⊢ (((Base‘ndx) ∈ ℕ ∧ 𝐵 ∈ 𝑉) → ⟨(Base‘ndx), 𝐵⟩ ∈ V)
7	4, 5, 6	syl2anc 411	. . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → ⟨(Base‘ndx), 𝐵⟩ ∈ V)
8		2str.e	. . . . . . . 8 ⊢ 𝐸 = Slot 𝑁
9		2str.n	. . . . . . . 8 ⊢ 𝑁 ∈ ℕ
10	8, 9	ndxarg 13128	. . . . . . 7 ⊢ (𝐸‘ndx) = 𝑁
11	10, 9	eqeltri 2303	. . . . . 6 ⊢ (𝐸‘ndx) ∈ ℕ
12	11	a1i 9	. . . . 5 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → (𝐸‘ndx) ∈ ℕ)
13		simpr 110	. . . . 5 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → + ∈ 𝑊)
14		opexg 4322	. . . . 5 ⊢ (((𝐸‘ndx) ∈ ℕ ∧ + ∈ 𝑊) → ⟨(𝐸‘ndx), + ⟩ ∈ V)
15	12, 13, 14	syl2anc 411	. . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → ⟨(𝐸‘ndx), + ⟩ ∈ V)
16		prexg 4303	. . . 4 ⊢ ((⟨(Base‘ndx), 𝐵⟩ ∈ V ∧ ⟨(𝐸‘ndx), + ⟩ ∈ V) → {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩} ∈ V)
17	7, 15, 16	syl2anc 411	. . 3 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩} ∈ V)
18	2, 17	eqeltrid 2317	. 2 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → 𝐺 ∈ V)
19	3	nnrei 9157	. . . . . 6 ⊢ (Base‘ndx) ∈ ℝ
20		2str.l	. . . . . . 7 ⊢ 1 < 𝑁
21		basendx 13160	. . . . . . 7 ⊢ (Base‘ndx) = 1
22	20, 21, 10	3brtr4i 4119	. . . . . 6 ⊢ (Base‘ndx) < (𝐸‘ndx)
23	19, 22	ltneii 8281	. . . . 5 ⊢ (Base‘ndx) ≠ (𝐸‘ndx)
24	23	a1i 9	. . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → (Base‘ndx) ≠ (𝐸‘ndx))
25		funprg 5382	. . . 4 ⊢ ((((Base‘ndx) ∈ ℕ ∧ (𝐸‘ndx) ∈ ℕ) ∧ (𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) ∧ (Base‘ndx) ≠ (𝐸‘ndx)) → Fun {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩})
26	4, 12, 5, 13, 24, 25	syl221anc 1284	. . 3 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → Fun {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩})
27	2	funeqi 5349	. . 3 ⊢ (Fun 𝐺 ↔ Fun {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩})
28	26, 27	sylibr 134	. 2 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → Fun 𝐺)
29		prid1g 3776	. . . 4 ⊢ (⟨(Base‘ndx), 𝐵⟩ ∈ V → ⟨(Base‘ndx), 𝐵⟩ ∈ {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩})
30	7, 29	syl 14	. . 3 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → ⟨(Base‘ndx), 𝐵⟩ ∈ {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩})
31	30, 2	eleqtrrdi 2324	. 2 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → ⟨(Base‘ndx), 𝐵⟩ ∈ 𝐺)
32	1, 18, 28, 31	strslfvd 13147	1 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → 𝐵 = (Base‘𝐺))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1397   ∈ wcel 2201   ≠ wne 2401  Vcvv 2801  {cpr 3671  ⟨cop 3673   class class class wbr 4089  Fun wfun 5322  ‘cfv 5328  1c1 8038   < clt 8219  ℕcn 9148  ndxcnx 13102  Slot cslot 13104  Basecbs 13105

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2203  ax-14 2204  ax-ext 2212  ax-sep 4208  ax-pow 4266  ax-pr 4301  ax-un 4532  ax-setind 4637  ax-cnex 8128  ax-resscn 8129  ax-1re 8131  ax-addrcl 8134  ax-pre-ltirr 8149

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1810  df-eu 2081  df-mo 2082  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-ne 2402  df-nel 2497  df-ral 2514  df-rex 2515  df-rab 2518  df-v 2803  df-sbc 3031  df-dif 3201  df-un 3203  df-in 3205  df-ss 3212  df-nul 3494  df-pw 3655  df-sn 3676  df-pr 3677  df-op 3679  df-uni 3895  df-int 3930  df-br 4090  df-opab 4152  df-mpt 4153  df-id 4392  df-xp 4733  df-rel 4734  df-cnv 4735  df-co 4736  df-dm 4737  df-rn 4738  df-res 4739  df-iota 5288  df-fun 5330  df-fv 5336  df-pnf 8221  df-mnf 8222  df-ltxr 8224  df-inn 9149  df-ndx 13108  df-slot 13109  df-base 13111

This theorem is referenced by:  grpbaseg  13233  eltpsg  14793