Definition df-2o 6484

Description: Define the ordinal number 2. (Contributed by NM, 18-Feb-2004.)

Assertion

Ref	Expression
df-2o	⊢ 2o = suc 1o

Detailed syntax breakdown of Definition df-2o

Step	Hyp	Ref	Expression
1		c2o 6477	. 2 class 2o
2		c1o 6476	. . 3 class 1o
3	2	csuc 4401	. 2 class suc 1o
4	1, 3	wceq 1364	1 wff 2o = suc 1o

This definition is referenced by:  2on  6492  2on0  6493  df2o3  6497  o1p1e2  6535  2onn  6588  nnm2  6593  enpr2d  6885  snnen2og  6929  1nen2  6931  pm54.43  7271  en2eleq  7276  en2other2  7277  exmidfodomrlemr  7283  exmidfodomrlemrALT  7284  prarloclemarch2  7505  prarloclemlt  7579  prarloclemn  7585  hash2  10923  bj-el2oss1o  15528  pwle2  15753  nnsf  15760