fractional derivative

*To*: mathgroup at smc.vnet.net*Subject*: [mg8502] fractional derivative*From*: jaime at p.mtr.civil.saitama-u.ac.jp (Jaime Y. Hernandez Jr.)*Date*: Thu, 4 Sep 1997 02:19:45 -0400*Sender*: owner-wri-mathgroup at wolfram.com

Dear Mathgroup members, I am developing a macroscopic model of a device and I'm using fractional derivatives, i.e. the order of the derivative is a fraction between 0 and 1. I went through the mathematica manual but could not find any reference to it. If you have any suggestions on how to solve such equations using mathematica I'd be very grateful. In conjunction with this problem, I tried to solve for the Inverse Laplace Transform of a function with the independent variable "s" raised to a fraction between 0 and 1. Mathematica simply returned what I inputed. Again, if you have any suggestions... Thanks a lot. Jaime