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Theorem tsetndxnn 12583
Description: The index of the slot for the group operation in an extensible structure is a positive integer. (Contributed by AV, 31-Oct-2024.)
Assertion
Ref Expression
tsetndxnn (TopSet‘ndx) ∈ ℕ

Proof of Theorem tsetndxnn
StepHypRef Expression
1 tsetndx 12580 . 2 (TopSet‘ndx) = 9
2 9nn 9058 . 2 9 ∈ ℕ
31, 2eqeltri 2248 1 (TopSet‘ndx) ∈ ℕ
Colors of variables: wff set class
Syntax hints:  wcel 2146  cfv 5208  cn 8890  9c9 8948  ndxcnx 12424  TopSetcts 12497
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 709  ax-5 1445  ax-7 1446  ax-gen 1447  ax-ie1 1491  ax-ie2 1492  ax-8 1502  ax-10 1503  ax-11 1504  ax-i12 1505  ax-bndl 1507  ax-4 1508  ax-17 1524  ax-i9 1528  ax-ial 1532  ax-i5r 1533  ax-13 2148  ax-14 2149  ax-ext 2157  ax-sep 4116  ax-pow 4169  ax-pr 4203  ax-un 4427  ax-cnex 7877  ax-resscn 7878  ax-1re 7880  ax-addrcl 7883
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1459  df-sb 1761  df-eu 2027  df-mo 2028  df-clab 2162  df-cleq 2168  df-clel 2171  df-nfc 2306  df-ral 2458  df-rex 2459  df-v 2737  df-sbc 2961  df-un 3131  df-in 3133  df-ss 3140  df-pw 3574  df-sn 3595  df-pr 3596  df-op 3598  df-uni 3806  df-int 3841  df-br 3999  df-opab 4060  df-mpt 4061  df-id 4287  df-xp 4626  df-rel 4627  df-cnv 4628  df-co 4629  df-dm 4630  df-rn 4631  df-res 4632  df-iota 5170  df-fun 5210  df-fv 5216  df-ov 5868  df-inn 8891  df-2 8949  df-3 8950  df-4 8951  df-5 8952  df-6 8953  df-7 8954  df-8 8955  df-9 8956  df-ndx 12430  df-slot 12431  df-tset 12510
This theorem is referenced by: (None)
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