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Theorem s1prc 11199
Description: Value of a singleton word if the symbol is a proper class. (Contributed by AV, 26-Mar-2022.)
Assertion
Ref Expression
s1prc 𝐴 ∈ V → ⟨“𝐴”⟩ = ⟨“∅”⟩)

Proof of Theorem s1prc
StepHypRef Expression
1 fvprc 5633 . . . 4 𝐴 ∈ V → ( I ‘𝐴) = ∅)
21opeq2d 3869 . . 3 𝐴 ∈ V → ⟨0, ( I ‘𝐴)⟩ = ⟨0, ∅⟩)
32sneqd 3682 . 2 𝐴 ∈ V → {⟨0, ( I ‘𝐴)⟩} = {⟨0, ∅⟩})
4 df-s1 11192 . 2 ⟨“𝐴”⟩ = {⟨0, ( I ‘𝐴)⟩}
5 0ex 4216 . . 3 ∅ ∈ V
6 s1val 11193 . . 3 (∅ ∈ V → ⟨“∅”⟩ = {⟨0, ∅⟩})
75, 6ax-mp 5 . 2 ⟨“∅”⟩ = {⟨0, ∅⟩}
83, 4, 73eqtr4g 2289 1 𝐴 ∈ V → ⟨“𝐴”⟩ = ⟨“∅”⟩)
Colors of variables: wff set class
Syntax hints:  ¬ wn 3  wi 4   = wceq 1397  wcel 2202  Vcvv 2802  c0 3494  {csn 3669  cop 3672   I cid 4385  cfv 5326  0cc0 8031  ⟨“cs1 11191
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-in1 619  ax-in2 620  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-14 2205  ax-ext 2213  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-setind 4635
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  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-ne 2403  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-iota 5286  df-fun 5328  df-fv 5334  df-s1 11192
This theorem is referenced by: (None)
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