$emptytriangle
$emptytriangle is replaced by $emptyperiodshape since $emptyperiodshape can cover the same setting function. The type 1 $emptyperiodshape is similar to this function.
$emptytriangle is replaced by $emptyperiodshape since $emptyperiodshape can cover the same setting function. The type 1 $emptyperiodshape is similar to this function.