Dear GAP-Forum,

it seems to me that the function PositionWord does not always
work correctly. The following looks quite strange to me, but maybe I
do not expect the right thing.

a := AbstractGenerator("a");;
b := AbstractGenerator("b");;

PositionWord(a*b*a,b,1);

yields the correct result

2

but

ag := AbstractGenerators("a",2);; a1 := ag[1];; a2 := ag[2];;

PositionWord(a1*a2*a1,a2,1);

signals an error:

Error, usage: PositionWord( <word>, <sub>[, <from>] )

greetings

Juergen Ecker
Universitaet Linz
Inst. f. Math.
Austria