Theorem basm 13167

Description: A structure whose base is inhabited is inhabited. (Contributed by Jim Kingdon, 14-Jun-2025.)

Hypothesis

Ref	Expression
basm.b	⊢ 𝐵 = (Base‘𝐺)

Assertion

Ref	Expression
basm	⊢ (𝐴 ∈ 𝐵 → ∃𝑗 𝑗 ∈ 𝐺)

Distinct variable group:   𝑗,𝐺

Allowed substitution hints:   𝐴(𝑗)   𝐵(𝑗)

Proof of Theorem basm

Step	Hyp	Ref	Expression
1		id 19	. . 3 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ 𝐵)
2		basm.b	. . . 4 ⊢ 𝐵 = (Base‘𝐺)
3		baseid 13159	. . . . 5 ⊢ Base = Slot (Base‘ndx)
4	2	basmex 13165	. . . . 5 ⊢ (𝐴 ∈ 𝐵 → 𝐺 ∈ V)
5		basendxnn 13161	. . . . . 6 ⊢ (Base‘ndx) ∈ ℕ
6	5	a1i 9	. . . . 5 ⊢ (𝐴 ∈ 𝐵 → (Base‘ndx) ∈ ℕ)
7	3, 4, 6	strnfvnd 13125	. . . 4 ⊢ (𝐴 ∈ 𝐵 → (Base‘𝐺) = (𝐺‘(Base‘ndx)))
8	2, 7	eqtrid 2275	. . 3 ⊢ (𝐴 ∈ 𝐵 → 𝐵 = (𝐺‘(Base‘ndx)))
9	1, 8	eleqtrd 2309	. 2 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ (𝐺‘(Base‘ndx)))
10		elfvm 5675	. 2 ⊢ (𝐴 ∈ (𝐺‘(Base‘ndx)) → ∃𝑗 𝑗 ∈ 𝐺)
11	9, 10	syl 14	1 ⊢ (𝐴 ∈ 𝐵 → ∃𝑗 𝑗 ∈ 𝐺)

Syntax hints:   → wi 4   = wceq 1397  ∃wex 1540   ∈ wcel 2201  Vcvv 2801  ‘cfv 5328  ℕcn 9148  ndxcnx 13102  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-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-cnex 8128  ax-resscn 8129  ax-1re 8131  ax-addrcl 8134

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  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-ral 2514  df-rex 2515  df-v 2803  df-sbc 3031  df-un 3203  df-in 3205  df-ss 3212  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-fn 5331  df-fv 5336  df-inn 9149  df-ndx 13108  df-slot 13109  df-base 13111

This theorem is referenced by:  relelbasov  13168