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Theorem basm 13414
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  e.  B  ->  E. j 
j  e.  G )
Distinct variable group:    j, G
Allowed substitution hints:    A( j)    B( j)

Proof of Theorem basm
StepHypRef Expression
1 id 19 . . 3  |-  ( A  e.  B  ->  A  e.  B )
2 basm.b . . . 4  |-  B  =  ( Base `  G
)
3 baseid 13406 . . . . 5  |-  Base  = Slot  ( Base `  ndx )
42basmex 13412 . . . . 5  |-  ( A  e.  B  ->  G  e.  _V )
5 basendxnn 13408 . . . . . 6  |-  ( Base `  ndx )  e.  NN
65a1i 9 . . . . 5  |-  ( A  e.  B  ->  ( Base `  ndx )  e.  NN )
73, 4, 6strnfvnd 13372 . . . 4  |-  ( A  e.  B  ->  ( Base `  G )  =  ( G `  ( Base `  ndx ) ) )
82, 7eqtrid 2283 . . 3  |-  ( A  e.  B  ->  B  =  ( G `  ( Base `  ndx ) ) )
91, 8eleqtrd 2317 . 2  |-  ( A  e.  B  ->  A  e.  ( G `  ( Base `  ndx ) ) )
10 elfvm 5729 . 2  |-  ( A  e.  ( G `  ( Base `  ndx ) )  ->  E. j  j  e.  G )
119, 10syl 14 1  |-  ( A  e.  B  ->  E. j 
j  e.  G )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    = wceq 1402   E.wex 1545    e. wcel 2209   _Vcvv 2821   ` cfv 5377   NNcn 9304   ndxcnx 13349   Basecbs 13352
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 9305  df-ndx 13355  df-slot 13356  df-base 13358
This theorem is used by:  relelbasov  13416  mgpbas  14225  ringidval  14265  opprringb  14386  asclfval  15021
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