Definition df-cco 16913

Description: Define the composition operation of a category. (Contributed by Mario Carneiro, 2-Jan-2017.) Use its index-independent form ccoid 17043 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 16900	. 2 class comp
2		c1 10803	. . . 4 class 1
3		c5 11961	. . . 4 class 5
4	2, 3	cdc 12366	. . 3 class ;15
5	4	cslot 16810	. 2 class Slot ;15
6	1, 5	wceq 1539	1 wff comp = Slot ;15

This definition is referenced by:  ccondx  17042  ccoid  17043  catcoppcclOLD  17749  catcfucclOLD  17751  catcxpcclOLD  17841