Definition df-2o 6569

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 6562	. 2 class 2o
2		c1o 6561	. . 3 class 1o
3	2	csuc 4456	. 2 class suc 1o
4	1, 3	wceq 1395	1 wff 2o = suc 1o

This definition is referenced by:  2on  6577  2on0  6578  df2o3  6583  o1p1e2  6622  2onn  6675  nnm2  6680  enpr2d  6980  snnen2og  7028  1nen2  7030  pm54.43  7371  en2eleq  7381  en2other2  7382  exmidfodomrlemr  7388  exmidfodomrlemrALT  7389  prarloclemarch2  7614  prarloclemlt  7688  prarloclemn  7694  hash2  11042  bj-el2oss1o  16162  pwle2  16390  nnsf  16398