Definition df-2o 6418

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 6411	. 2 class 2o
2		c1o 6410	. . 3 class 1o
3	2	csuc 4366	. 2 class suc 1o
4	1, 3	wceq 1353	1 wff 2o = suc 1o

This definition is referenced by:  2on  6426  2on0  6427  df2o3  6431  o1p1e2  6469  2onn  6522  nnm2  6527  enpr2d  6817  snnen2og  6859  1nen2  6861  pm54.43  7189  en2eleq  7194  en2other2  7195  exmidfodomrlemr  7201  exmidfodomrlemrALT  7202  prarloclemarch2  7418  prarloclemlt  7492  prarloclemn  7498  hash2  10792  bj-el2oss1o  14529  pwle2  14751  nnsf  14757