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| Mirrors > Home > ILE Home > Th. List > df-cco | Unicode version | ||
| Description: Define the composition operation of a category. (Contributed by Mario Carneiro, 2-Jan-2017.) | 
| Ref | Expression | 
|---|---|
| df-cco | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | cco 12767 | 
. 2
 | |
| 2 | c1 7880 | 
. . . 4
 | |
| 3 | c5 9044 | 
. . . 4
 | |
| 4 | 2, 3 | cdc 9457 | 
. . 3
 | 
| 5 | 4 | cslot 12677 | 
. 2
 | 
| 6 | 1, 5 | wceq 1364 | 
1
 | 
| Colors of variables: wff set class | 
| This definition is referenced by: ccoid 12908 ccoslid 12909 | 
| Copyright terms: Public domain | W3C validator |