Definition df-2o 6396

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 6389	. 2 class 2o
2		c1o 6388	. . 3 class 1o
3	2	csuc 4350	. 2 class suc 1o
4	1, 3	wceq 1348	1 wff 2o = suc 1o

This definition is referenced by:  2on  6404  2on0  6405  df2o3  6409  o1p1e2  6447  2onn  6500  nnm2  6505  enpr2d  6795  snnen2og  6837  1nen2  6839  pm54.43  7167  en2eleq  7172  en2other2  7173  exmidfodomrlemr  7179  exmidfodomrlemrALT  7180  prarloclemarch2  7381  prarloclemlt  7455  prarloclemn  7461  hash2  10747  bj-el2oss1o  13809  pwle2  14031  nnsf  14038