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Theorem basm 13473
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
StepHypRef Expression
1 id 19 . . 3 (𝐴 ∈ 𝐵 → 𝐴 ∈ 𝐵)
2 basm.b . . . 4 𝐵 = (Base‘𝐺)
3 baseid 13465 . . . . 5 Base = Slot (Base‘ndx)
42basmex 13471 . . . . 5 (𝐴 ∈ 𝐵 → 𝐺 ∈ V)
5 basendxnn 13467 . . . . . 6 (Base‘ndx) ∈ ℕ
65a1i 9 . . . . 5 (𝐴 ∈ 𝐵 → (Base‘ndx) ∈ ℕ)
73, 4, 6strnfvnd 13431 . . . 4 (𝐴 ∈ 𝐵 → (Base‘𝐺) = (𝐺‘(Base‘ndx)))
82, 7eqtrid 2283 . . 3 (𝐴 ∈ 𝐵 → 𝐵 = (𝐺‘(Base‘ndx)))
91, 8eleqtrd 2317 . 2 (𝐴 ∈ 𝐵 → 𝐴 ∈ (𝐺‘(Base‘ndx)))
10 elfvm 5732 . 2 (𝐴 ∈ (𝐺‘(Base‘ndx)) → ∃𝑗 𝑗 ∈ 𝐺)
119, 10syl 14 1 (𝐴 ∈ 𝐵 → ∃𝑗 𝑗 ∈ 𝐺)
Colors of variables:    wff set class
This proof depends on syntax axioms:   → wi 4   = wceq 1402  ∃wex 1545   ∈ wcel 2209  Vcvv 2821  ‘cfv 5380  ℕcn 9314  ndxcnx 13408  Basecbs 13411
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  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 4251  ax-pow 4313  ax-pr 4348  ax-un 4580  ax-cnex 8277  ax-resscn 8278  ax-1re 8280  ax-addrcl 8283
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  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-ral 2533  df-rex 2534  df-v 2823  df-sbc 3052  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4132  df-opab 4194  df-mpt 4195  df-id 4440  df-xp 4782  df-rel 4783  df-cnv 4784  df-co 4785  df-dm 4786  df-rn 4787  df-res 4788  df-iota 5340  df-fun 5382  df-fn 5383  df-fv 5388  df-inn 9315  df-ndx 13414  df-slot 13415  df-base 13417
This theorem is used by:  relelbasov  13475  cntzm  14162  mgpbas  14333  ringidval  14373  opprringb  14496  asclfval  15131
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