[GAP Forum] bugs?

[Laurent Bartholdi]

hi y'all,
a bunch of strange things happened to me these last days when i played 
around with gap. i use a fairly recent version from cvs (don't remember 
when i updated it last):

gap> A := GroupRing(GF(5),SymmetricGroup(4));
<algebra-with-one over GF(5), with 2 generators>
gap> 3*A.1;
(Z(5)^3)*(1,2,3,4)
gap> 3/4*A.1;
Error, no method found! For debugging hints type ?Recovery from NoMethodFound
Error, no 1st choice method found for `PROD' on 2 arguments called from
gap> 3*A.1/4;
Z(5)*(1,2,3,4)
gap> A.1*3/4;
Z(5)*(1,2,3,4)
---------------------------------------------------
gap> L := LeftIdeal(A,[A.1+A.1^2+A.1^3+A.1^4]);; B := Basis(L);;
gap> IsList(B);
true
gap> Concatenation([A.1],B);
AppendList: <list2> must be a small list (not a object (component)) at 
Append( res, arg[i] );
  called from
<function>( <arguments> ) called from read-eval-loop
...
gap> Concatenation([A.1],Elements(B));
[ (Z(241)^0)*(1,2,3,4), ... ]
gap> Concatenation([A.1],B);
[ (Z(241)^0)*(1,2,3,4), ... ]
gap>


-- 
--
Laurent Bartholdi           \  laurent.bartholdi<at>epfl<dot>ch
EPFL, IGAT, Bâtiment BCH     \    Téléphone: +41 21-6930380
CH-1015 Lausanne, Switzerland \      Fax: +41 21-6930385
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