Theorem sn-base0 43081

Description: Avoid axioms in base0 17233 by using the discouraged df-base 17229. This kind of axiom save is probably not worth it. (Contributed by SN, 16-Sep-2025.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
sn-base0	⊢ ∅ = (Base‘∅)

Proof of Theorem sn-base0

Step	Hyp	Ref	Expression
1		df-base 17229	. 2 ⊢ Base = Slot 1
2	1	str0 17208	1 ⊢ ∅ = (Base‘∅)

Syntax hints:   = wceq 1559  ∅c0 4285  ‘cfv 6517  1c1 11071  Basecbs 17228

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5245  ax-nul 5255  ax-pr 5389

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3076  df-rex 3086  df-rab 3414  df-v 3455  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4480  df-sn 4582  df-pr 4584  df-op 4588  df-uni 4865  df-br 5100  df-opab 5162  df-mpt 5181  df-id 5540  df-xp 5651  df-rel 5652  df-cnv 5653  df-co 5654  df-dm 5655  df-iota 6473  df-fun 6519  df-fv 6525  df-slot 17201  df-base 17229

This theorem is referenced by: (None)