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Definition df-tgp 21023
Description: Define the class of all topological groups. A topological group is a group whose operation and inverse function are continuous. (Contributed by FL, 18-Apr-2010.)
Assertion
Ref Expression
df-tgp  |-  TopGrp  =  {
f  e.  ( Grp 
i^i TopMnd )  |  [. ( TopOpen
`  f )  / 
j ]. ( invg `  f )  e.  ( j  Cn  j ) }
Distinct variable group:    f, j

Detailed syntax breakdown of Definition df-tgp
StepHypRef Expression
1 ctgp 21021 . 2  class  TopGrp
2 vf . . . . . . 7  setvar  f
32cv 1436 . . . . . 6  class  f
4 cminusg 16606 . . . . . 6  class  invg
53, 4cfv 5537 . . . . 5  class  ( invg `  f )
6 vj . . . . . . 7  setvar  j
76cv 1436 . . . . . 6  class  j
8 ccn 20175 . . . . . 6  class  Cn
97, 7, 8co 6242 . . . . 5  class  ( j  Cn  j )
105, 9wcel 1872 . . . 4  wff  ( invg `  f )  e.  ( j  Cn  j )
11 ctopn 15256 . . . . 5  class  TopOpen
123, 11cfv 5537 . . . 4  class  ( TopOpen `  f )
1310, 6, 12wsbc 3235 . . 3  wff  [. ( TopOpen
`  f )  / 
j ]. ( invg `  f )  e.  ( j  Cn  j )
14 cgrp 16605 . . . 4  class  Grp
15 ctmd 21020 . . . 4  class TopMnd
1614, 15cin 3371 . . 3  class  ( Grp 
i^i TopMnd )
1713, 2, 16crab 2712 . 2  class  { f  e.  ( Grp  i^i TopMnd )  |  [. ( TopOpen `  f )  /  j ]. ( invg `  f )  e.  ( j  Cn  j ) }
181, 17wceq 1437 1  wff  TopGrp  =  {
f  e.  ( Grp 
i^i TopMnd )  |  [. ( TopOpen
`  f )  / 
j ]. ( invg `  f )  e.  ( j  Cn  j ) }
Colors of variables: wff setvar class
This definition is referenced by:  istgp  21027
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