Theorem 2strbasg 13457

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 13393	. 2 ⊢ (Base = Slot (Base‘ndx) ∧ (Base‘ndx) ∈ ℕ)
2		2str.g	. . 3 ⊢ 𝐺 = {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩}
3		basendxnn 13391	. . . . . 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 4366	. . . . 5 ⊢ (((Base‘ndx) ∈ ℕ ∧ 𝐵 ∈ 𝑉) → ⟨(Base‘ndx), 𝐵⟩ ∈ V)
7	4, 5, 6	syl2anc 415	. . . 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 13358	. . . . . . 7 ⊢ (𝐸‘ndx) = 𝑁
11	10, 9	eqeltri 2311	. . . . . 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 4366	. . . . 5 ⊢ (((𝐸‘ndx) ∈ ℕ ∧ + ∈ 𝑊) → ⟨(𝐸‘ndx), + ⟩ ∈ V)
15	12, 13, 14	syl2anc 415	. . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → ⟨(𝐸‘ndx), + ⟩ ∈ V)
16		prexg 4347	. . . 4 ⊢ ((⟨(Base‘ndx), 𝐵⟩ ∈ V ∧ ⟨(𝐸‘ndx), + ⟩ ∈ V) → {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩} ∈ V)
17	7, 15, 16	syl2anc 415	. . 3 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩} ∈ V)
18	2, 17	eqeltrid 2325	. 2 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → 𝐺 ∈ V)
19	3	nnrei 9296	. . . . . 6 ⊢ (Base‘ndx) ∈ ℝ
20		2str.l	. . . . . . 7 ⊢ 1 < 𝑁
21		basendx 13390	. . . . . . 7 ⊢ (Base‘ndx) = 1
22	20, 21, 10	3brtr4i 4158	. . . . . 6 ⊢ (Base‘ndx) < (𝐸‘ndx)
23	19, 22	ltneii 8416	. . . . 5 ⊢ (Base‘ndx) ≠ (𝐸‘ndx)
24	23	a1i 9	. . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → (Base‘ndx) ≠ (𝐸‘ndx))
25		funprg 5429	. . . 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 1289	. . 3 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → Fun {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩})
27	2	funeqi 5396	. . 3 ⊢ (Fun 𝐺 ↔ Fun {⟨(Base‘ndx), 𝐵⟩, ⟨(𝐸‘ndx), + ⟩})
28	26, 27	sylibr 134	. 2 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → Fun 𝐺)
29		prid1g 3814	. . . 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 2332	. 2 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → ⟨(Base‘ndx), 𝐵⟩ ∈ 𝐺)
32	1, 18, 28, 31	strslfvd 13377	1 ⊢ ((𝐵 ∈ 𝑉 ∧ + ∈ 𝑊) → 𝐵 = (Base‘𝐺))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1402   ∈ wcel 2209   ≠ wne 2420  Vcvv 2821  {cpr 3709  ⟨cop 3711   class class class wbr 4128  Fun wfun 5369  ‘cfv 5375  1c1 8174   < clt 8354  ℕcn 9287  ndxcnx 13332  Slot cslot 13334  Basecbs 13335

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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4247  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-setind 4682  ax-cnex 8264  ax-resscn 8265  ax-1re 8267  ax-addrcl 8270  ax-pre-ltirr 8285

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-int 3969  df-br 4129  df-opab 4191  df-mpt 4192  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-iota 5335  df-fun 5377  df-fv 5383  df-pnf 8356  df-mnf 8357  df-ltxr 8359  df-inn 9288  df-ndx 13338  df-slot 13339  df-base 13341

This theorem is referenced by:  grpbaseg  13464  eltpsg  15124