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Definition df-cco 17322
Description: Define the composition operation of a category. (Contributed by Mario Carneiro, 2-Jan-2017.) Use its index-independent form ccoid 17459 instead. (New usage is discouraged.)
Assertion
Ref Expression
df-cco comp = Slot 15

Detailed syntax breakdown of Definition df-cco
StepHypRef Expression
1 cco 17309 . 2 class comp
2 c1 11153 . . . 4 class 1
3 c5 12321 . . . 4 class 5
42, 3cdc 12730 . . 3 class 15
54cslot 17214 . 2 class Slot 15
61, 5wceq 1536 1 wff comp = Slot 15
Colors of variables: wff setvar class
This definition is referenced by:  ccondx  17458  ccoid  17459  catcoppcclOLD  18171  catcfucclOLD  18173  catcxpcclOLD  18263
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