Function: lcm
Section: number_theoretical
C-Name: glcm0
Prototype: GDG
Help: lcm(x,{y}): least common multiple of x and y, i.e. x*y / gcd(x,y)
Description: 
 (int, int):int lcmii($1, $2)
 (gen):gen      glcm0($1, NULL)
 (gen, gen):gen glcm($1, $2)

