df-cco - Metamath Proof Explorer

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Definition df-cco 17252

Description: Define the composition operation of a category. (Contributed by Mario Carneiro, 2-Jan-2017.) Use its index-independent form ccoid 17389 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 17239	. 2 class comp
2		c1 11134	. . . 4 class 1
3		c5 12295	. . . 4 class 5
4	2, 3	cdc 12702	. . 3 class ;15
5	4	cslot 17144	. 2 class Slot ;15
6	1, 5	wceq 1534	1 wff comp = Slot ;15

Colors of variables: wff setvar class

This definition is referenced by: ccondx 17388 ccoid 17389 catcoppcclOLD 18101 catcfucclOLD 18103 catcxpcclOLD 18193

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