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Theorem basm 13146
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 13138 . . . . 5 Base = Slot (Base‘ndx)
42basmex 13144 . . . . 5 (𝐴𝐵𝐺 ∈ V)
5 basendxnn 13140 . . . . . 6 (Base‘ndx) ∈ ℕ
65a1i 9 . . . . 5 (𝐴𝐵 → (Base‘ndx) ∈ ℕ)
73, 4, 6strnfvnd 13104 . . . 4 (𝐴𝐵 → (Base‘𝐺) = (𝐺‘(Base‘ndx)))
82, 7eqtrid 2276 . . 3 (𝐴𝐵𝐵 = (𝐺‘(Base‘ndx)))
91, 8eleqtrd 2310 . 2 (𝐴𝐵𝐴 ∈ (𝐺‘(Base‘ndx)))
10 elfvm 5672 . 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 1397  wex 1540  wcel 2202  Vcvv 2802  cfv 5326  cn 9143  ndxcnx 13081  Basecbs 13084
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-cnex 8123  ax-resscn 8124  ax-1re 8126  ax-addrcl 8129
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-iota 5286  df-fun 5328  df-fn 5329  df-fv 5334  df-inn 9144  df-ndx 13087  df-slot 13088  df-base 13090
This theorem is referenced by:  relelbasov  13147
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