def summand(i):
return Expression(f, get_part(list1, i_cur + [i]),
get_part(list2, [i] + j_cur))
def summand(i):
return Expression(f, get_part(list1, i_cur + [i]),
get_part(list2, [i] + j_cur))
def summand(i):
part1 = get_part(list1, i_cur + [i])
part2 = get_part(list2, [i] + j_cur)
return Expression(f, part1, part2)
