Definition df-10 7981

Description: Define the number 10. See remarks under df-2 7973. (Contributed by NM, 5-Feb-2007.)

Assertion

Ref	Expression
df-10	|- 10 = ( 9 + 1 )

Detailed syntax breakdown of Definition df-10

Step	Hyp	Ref	Expression
1		c10 7972	. 2 class 10
2		c9 7971	. . 3 class 9
3		c1 6890	. . 3 class 1
4		caddc 6892	. . 3 class +
5	2, 3, 4	co 5512	. 2 class ( 9 + 1 )
6	1, 5	wceq 1243	1 wff 10 = ( 9 + 1 )

This definition is referenced by:  10re  8004  10pos  8021  9p1e10  8051  5p5e10  8060  6p4e10  8063  7p3e10  8065  8p2e10  8066  10nn  8085  9lt10  8122  decsucc  8394  9p2e11  8429