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Definition df-topsp 12235
Description: Define the class of topological spaces (as extensible structures). (Contributed by Stefan O'Rear, 13-Aug-2015.)
Assertion
Ref Expression
df-topsp  |-  TopSp  =  {
f  |  ( TopOpen `  f )  e.  (TopOn `  ( Base `  f
) ) }

Detailed syntax breakdown of Definition df-topsp
StepHypRef Expression
1 ctps 12234 . 2  class  TopSp
2 vf . . . . . 6  setvar  f
32cv 1331 . . . . 5  class  f
4 ctopn 12158 . . . . 5  class  TopOpen
53, 4cfv 5130 . . . 4  class  ( TopOpen `  f )
6 cbs 11996 . . . . . 6  class  Base
73, 6cfv 5130 . . . . 5  class  ( Base `  f )
8 ctopon 12214 . . . . 5  class TopOn
97, 8cfv 5130 . . . 4  class  (TopOn `  ( Base `  f )
)
105, 9wcel 1481 . . 3  wff  ( TopOpen `  f )  e.  (TopOn `  ( Base `  f
) )
1110, 2cab 2126 . 2  class  { f  |  ( TopOpen `  f
)  e.  (TopOn `  ( Base `  f )
) }
121, 11wceq 1332 1  wff  TopSp  =  {
f  |  ( TopOpen `  f )  e.  (TopOn `  ( Base `  f
) ) }
Colors of variables: wff set class
This definition is referenced by:  istps  12236
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