Definition df-7 8103

Description: Define the number 7. (Contributed by NM, 27-May-1999.)

Assertion

Ref	Expression
df-7	|- 7 = ( 6 + 1 )

Detailed syntax breakdown of Definition df-7

Step	Hyp	Ref	Expression
1		c7 8094	. 2 class 7
2		c6 8093	. . 3 class 6
3		c1 6982	. . 3 class 1
4		caddc 6984	. . 3 class +
5	2, 3, 4	co 5532	. 2 class ( 6 + 1 )
6	1, 5	wceq 1284	1 wff 7 = ( 6 + 1 )

This definition is referenced by:  7re  8122  7pos  8141  6p1e7  8170  4p3e7  8176  5p2e7  8178  6p2e8  8181  7nn  8198  6lt7  8216  7p7e14  8555  8p7e15  8561  9p7e16  8568  9p8e17  8569  7t7e49  8590  8t7e56  8596  9t7e63  8603