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Theorem basm 12679
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 (𝐴𝐵 → ∃𝑗 𝑗𝐺)
Distinct variable group:   𝑗,𝐺
Allowed substitution hints:   𝐴(𝑗)   𝐵(𝑗)

Proof of Theorem basm
StepHypRef Expression
1 id 19 . . 3 (𝐴𝐵𝐴𝐵)
2 basm.b . . . 4 𝐵 = (Base‘𝐺)
3 baseid 12672 . . . . 5 Base = Slot (Base‘ndx)
42basmex 12677 . . . . 5 (𝐴𝐵𝐺 ∈ V)
5 basendxnn 12674 . . . . . 6 (Base‘ndx) ∈ ℕ
65a1i 9 . . . . 5 (𝐴𝐵 → (Base‘ndx) ∈ ℕ)
73, 4, 6strnfvnd 12638 . . . 4 (𝐴𝐵 → (Base‘𝐺) = (𝐺‘(Base‘ndx)))
82, 7eqtrid 2238 . . 3 (𝐴𝐵𝐵 = (𝐺‘(Base‘ndx)))
91, 8eleqtrd 2272 . 2 (𝐴𝐵𝐴 ∈ (𝐺‘(Base‘ndx)))
10 elfvm 5587 . 2 (𝐴 ∈ (𝐺‘(Base‘ndx)) → ∃𝑗 𝑗𝐺)
119, 10syl 14 1 (𝐴𝐵 → ∃𝑗 𝑗𝐺)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1364  wex 1503  wcel 2164  Vcvv 2760  cfv 5254  cn 8982  ndxcnx 12615  Basecbs 12618
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 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-sep 4147  ax-pow 4203  ax-pr 4238  ax-un 4464  ax-cnex 7963  ax-resscn 7964  ax-1re 7966  ax-addrcl 7969
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ral 2477  df-rex 2478  df-v 2762  df-sbc 2986  df-un 3157  df-in 3159  df-ss 3166  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-int 3871  df-br 4030  df-opab 4091  df-mpt 4092  df-id 4324  df-xp 4665  df-rel 4666  df-cnv 4667  df-co 4668  df-dm 4669  df-rn 4670  df-res 4671  df-iota 5215  df-fun 5256  df-fn 5257  df-fv 5262  df-inn 8983  df-ndx 12621  df-slot 12622  df-base 12624
This theorem is referenced by:  relelbasov  12680
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