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Definition df-cco 17229
Description: Define the composition operation of a category. (Contributed by Mario Carneiro, 2-Jan-2017.) Use its index-independent form ccoid 17366 instead. (New usage is discouraged.)
Assertion
Ref Expression
df-cco comp = Slot 15

Detailed syntax breakdown of Definition df-cco
StepHypRef Expression
1 cco 17216 . 2 class comp
2 c1 11110 . . . 4 class 1
3 c5 12271 . . . 4 class 5
42, 3cdc 12678 . . 3 class 15
54cslot 17121 . 2 class Slot 15
61, 5wceq 1533 1 wff comp = Slot 15
Colors of variables: wff setvar class
This definition is referenced by:  ccondx  17365  ccoid  17366  catcoppcclOLD  18078  catcfucclOLD  18080  catcxpcclOLD  18170
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