Hi derivians, I had a problem with pade.mth that appears in DNL #49. Apparently it does not work properly on rational functions for some initial value of the variable (x=0 in my example), but it does if you change the expansion point. You may say that it is foolish to look for a rational approximation to a rational function, but I was just testing the program. Best regards, Marcelo Francisco M. Fernández, CEQUINOR, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calle 47 y 115, Casilla de Correo 962, 1900 La Plata, Argentina. Phone/fax: (54-221) 482-2643/424-0172 E-mail [log in to unmask] [log in to unmask] [log in to unmask] http://www.conicet.gov.ar/webue/cequinor/mick.htm