This returns 0 in FriCAS but of course it not defined at x=0. Other systems, for example Maple, define
signum(x) == abs(x)/x and signum(1,x) == D(signum(x),x) then D(signum(1,x),x) = signum(1,x) with signum(1,x) begin a function that is 0 everywhere except undefined at 0. What would be required to support derivatives like this (and other related functions such as Dirac delta and Heaviside step function)? Is there something like this already hidden somewhere in FriCAS? -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/fricas-devel. For more options, visit https://groups.google.com/d/optout.
