InitClassesCharTable( tbl )
returns the list of conjugacy class lengths of the character table tbl,
and assigns it to the field tbl.classes
; the classlengths are
computed from the centralizer orders of tbl.
InitClassesCharTable
is called automatically for tables that are read
from the library (see CharTable) or constructed as generic character
tables (see Generic Character Tables).
gap> t:= rec( centralizers:= [ 2, 2 ], identifier:= "C2" );; gap> InitClassesCharTable( t ); t; [ 1, 1 ] rec( centralizers := [ 2, 2 ], identifier := "C2", classes := [ 1, 1 ] )
GAP 3.4.4