Theorem 2strbasg 13205

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 13142	. 2 ⊢ (Base = Slot (Base‘ndx) ∧ (Base‘ndx) ∈ ℕ)
2		2str.g	. . 3 ⊢ 𝐺 = {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩}
3		basendxnn 13140	. . . . . 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 4320	. . . . 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 13107	. . . . . . 7 ⊢ (𝐸‘ndx) = 𝑁
11	10, 9	eqeltri 2304	. . . . . 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 4320	. . . . 5 ⊢ (((𝐸‘ndx) ∈ ℕ ∧ + ∈ 𝑊) → ⟨(𝐸‘ndx), + ⟩ ∈ V)
15	12, 13, 14	syl2anc 411	. . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → ⟨(𝐸‘ndx), + ⟩ ∈ V)
16		prexg 4301	. . . 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 2318	. 2 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → 𝐺 ∈ V)
19	3	nnrei 9152	. . . . . 6 ⊢ (Base‘ndx) ∈ ℝ
20		2str.l	. . . . . . 7 ⊢ 1 < 𝑁
21		basendx 13139	. . . . . . 7 ⊢ (Base‘ndx) = 1
22	20, 21, 10	3brtr4i 4118	. . . . . 6 ⊢ (Base‘ndx) < (𝐸‘ndx)
23	19, 22	ltneii 8276	. . . . 5 ⊢ (Base‘ndx) ≠ (𝐸‘ndx)
24	23	a1i 9	. . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → (Base‘ndx) ≠ (𝐸‘ndx))
25		funprg 5380	. . . 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 5347	. . 3 ⊢ (Fun 𝐺 ↔ Fun {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩})
28	26, 27	sylibr 134	. 2 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → Fun 𝐺)
29		prid1g 3775	. . . 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 2325	. 2 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → ⟨(Base‘ndx), 𝐵⟩ ∈ 𝐺)
32	1, 18, 28, 31	strslfvd 13126	1 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → 𝐵 = (Base‘𝐺))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1397   ∈ wcel 2202   ≠ wne 2402  Vcvv 2802  {cpr 3670  ⟨cop 3672   class class class wbr 4088  Fun wfun 5320  ‘cfv 5326  1c1 8033   < clt 8214  ℕcn 9143  ndxcnx 13081  Slot cslot 13083  Basecbs 13084

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 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-cnex 8123  ax-resscn 8124  ax-1re 8126  ax-addrcl 8129  ax-pre-ltirr 8144

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-nel 2498  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-sbc 3032  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-iota 5286  df-fun 5328  df-fv 5334  df-pnf 8216  df-mnf 8217  df-ltxr 8219  df-inn 9144  df-ndx 13087  df-slot 13088  df-base 13090

This theorem is referenced by:  grpbaseg  13212  eltpsg  14767