Function: kronecker
Section: number_theoretical
C-Name: gkronecker
Prototype: GG
Help: kronecker(x,y): kronecker symbol (x/y)
Description: 
 (small, small):small	kross($1, $2)
 (int, small):small	krois($1, $2)
 (small, int):small	krosi($1, $2)
 (int, int):small	kronecker($1, $2)
 (gen, small):gen	gkrogs($1, $2)
 (gen, gen):gen	gkronecker($1, $2)

