I have written simple ilaplace(similar to continious ifourier) and iz-trans(similar to descrete ifourier) that it expands fraction of H(s) or H(z) and returns h(t) with zimmers mathematical solution for expanding fraction, it has a very better speed in compare with TI,but it only works on fraction D/N that D,N=a1+a2*x+a3*x^2+...for example it can solve (s^5+s^3-12s^2+3)/(s^5-s^4-s^2+5)
in my case i only need this because i do other thinks like time shift on my own,but if you have any idea for adding lap and z-trans or solve problems in ilap or iz in cases like exp(s)/(s+1),please contact me.
my email is mortezahaydari AT yahoo.com
i had also written some numerical caclculating programs...
