DotDClasses for a Rees 0-matrix semigroup

Issue #55 resolved
created an issue

Semigroups doesn't seem to do DotDClasses for a RZMS.

gap> G:=Group([ (1,2,8,5), (1,8,2,5) ]);;
gap> mat:=[ [ (), (5,8), (1,2,5) ], [ (1,8)(2,5), 0, 0 ], [ (1,5,8,2), 0, (5,8) ] ];; 
gap> r:=ReesZeroMatrixSemigroup(G,mat);
<Rees 0-matrix semigroup 3x3 over Group([ (1,2,8,5), (1,8,2,5) ])>
gap> IsReesZeroMatrixSemigroup(r);
gap> DotDClasses(r);
Error, no method found! For debugging hints type ?Recovery from NoMethodFound
Error, no 1st choice method found for `DotDClasses' on 1 arguments called from
<function "HANDLE_METHOD_NOT_FOUND">( <arguments> )
 called from read-eval loop at line 23 of *stdin*
you can 'quit;' to quit to outer loop, or
you can 'return;' to continue
brk> quit;
gap> DotDClasses(Range(IsomorphismTransformationSemigroup(r)));;

A temporary fix would be calling DotDClasses on the range of a isomorphism to a transformation semigroup.

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