Theorem sucon 4680

Description: The class of all ordinal numbers is its own successor. (Contributed by NM, 12-Sep-2003.)

Assertion

Ref	Expression
sucon	⊢ suc On = On

Proof of Theorem sucon

Step	Hyp	Ref	Expression
1		onprc 4679	. 2 ⊢ ¬ On ∈ V
2		sucprc 4538	. 2 ⊢ (¬ On ∈ V → suc On = On)
3	1, 2	ax-mp 5	1 ⊢ suc On = On

Syntax hints:  ¬ wn 3   = wceq 1398   ∈ wcel 2205  Vcvv 2815  Oncon0 4489  suc csuc 4491

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216  ax-setind 4664

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-ral 2527  df-rex 2528  df-v 2817  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-sn 3700  df-uni 3920  df-tr 4214  df-iord 4492  df-on 4494  df-suc 4497

This theorem is referenced by: (None)