[GiNaC-list] series of x^n around x=0

Hi all, I got a question while using series on x^n with n a non-integer. here is an example: ------ symbol x("x"); ex expr = pow(x, ex(3)/2); // 3/2 may be a general non-integer cout << expr.series(x,2) << endl; ------ The output is: Order(x^2) so is there a way to handle this? Best regards! Feng