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| Mirrors > Home > ILE Home > Th. List > df-tset | Unicode version | ||
| Description: Define the topology component of a topological space (structure). (Contributed by NM, 4-Sep-2011.) (Revised by Mario Carneiro, 14-Aug-2015.) | 
| Ref | Expression | 
|---|---|
| df-tset | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | cts 12761 | 
. 2
 | |
| 2 | c9 9048 | 
. . 3
 | |
| 3 | 2 | cslot 12677 | 
. 2
 | 
| 4 | 1, 3 | wceq 1364 | 
1
 | 
| Colors of variables: wff set class | 
| This definition is referenced by: tsetndx 12863 tsetid 12864 tsetslid 12865 eltpsg 14276 | 
| Copyright terms: Public domain | W3C validator |