Definition df-cco 17219

Description: Define the composition operation of a category. (Contributed by Mario Carneiro, 2-Jan-2017.) Use its index-independent form ccoid 17356 instead. (New usage is discouraged.)

Assertion

Ref	Expression
df-cco	⊢ comp = Slot ;15

Detailed syntax breakdown of Definition df-cco

Step	Hyp	Ref	Expression
1		cco 17206	. 2 class comp
2		c1 11108	. . . 4 class 1
3		c5 12267	. . . 4 class 5
4	2, 3	cdc 12674	. . 3 class ;15
5	4	cslot 17111	. 2 class Slot ;15
6	1, 5	wceq 1542	1 wff comp = Slot ;15

This definition is referenced by:  ccondx  17355  ccoid  17356  catcoppcclOLD  18065  catcfucclOLD  18067  catcxpcclOLD  18157