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Theorem basm 13416
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 13408 . . . . 5 Base = Slot (Base‘ndx)
42basmex 13414 . . . . 5 (𝐴𝐵𝐺 ∈ V)
5 basendxnn 13410 . . . . . 6 (Base‘ndx) ∈ ℕ
65a1i 9 . . . . 5 (𝐴𝐵 → (Base‘ndx) ∈ ℕ)
73, 4, 6strnfvnd 13374 . . . 4 (𝐴𝐵 → (Base‘𝐺) = (𝐺‘(Base‘ndx)))
82, 7eqtrid 2283 . . 3 (𝐴𝐵𝐵 = (𝐺‘(Base‘ndx)))
91, 8eleqtrd 2317 . 2 (𝐴𝐵𝐴 ∈ (𝐺‘(Base‘ndx)))
10 elfvm 5729 . 2 (𝐴 ∈ (𝐺‘(Base‘ndx)) → ∃𝑗 𝑗𝐺)
119, 10syl 14 1 (𝐴𝐵 → ∃𝑗 𝑗𝐺)
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4   = wceq 1402  wex 1545  wcel 2209  Vcvv 2821  cfv 5377  cn 9305  ndxcnx 13351  Basecbs 13354
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 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-cnex 8270  ax-resscn 8271  ax-1re 8273  ax-addrcl 8276
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 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-iota 5337  df-fun 5379  df-fn 5380  df-fv 5385  df-inn 9306  df-ndx 13357  df-slot 13358  df-base 13360
This theorem is used by:  relelbasov  13418  mgpbas  14227  ringidval  14267  opprringb  14388  asclfval  15023
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