Definition df-2o 6417

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 6410	. 2 class 2o
2		c1o 6409	. . 3 class 1o
3	2	csuc 4365	. 2 class suc 1o
4	1, 3	wceq 1353	1 wff 2o = suc 1o

This definition is referenced by:  2on  6425  2on0  6426  df2o3  6430  o1p1e2  6468  2onn  6521  nnm2  6526  enpr2d  6816  snnen2og  6858  1nen2  6860  pm54.43  7188  en2eleq  7193  en2other2  7194  exmidfodomrlemr  7200  exmidfodomrlemrALT  7201  prarloclemarch2  7417  prarloclemlt  7491  prarloclemn  7497  hash2  10791  bj-el2oss1o  14496  pwle2  14718  nnsf  14724