Abhinav Baid wrote: > I'd like to contribute to FriCAS and hence, would like ideas for any other > code samples I could write.
Typically differential operators are written using ordinary derivative D. But sametimes it is easier to write then in terms of different derivative, in particular delta = xD (van Hoej uses this a lot). Some time ago I wrote a domain implementing differantial operators written in terms of delta (unfortunately in the output it is shown as D, but it behaves as delta should behave). You can find this domain at http://math.uni.wroc.pl/~hebisch/fricas/lodo3.spad It can be used like this: F := Fraction(Integer) uP := UnivariatePolynomial('x, F) rF := Fraction(uP) L := LinearOrdinaryDifferentialOperator3(F, uP, rF) You can think how to convert operator from LinearOrdinaryDifferentialOperator1 to LinearOrdinaryDifferentialOperator3 and back. -- Waldek Hebisch [email protected] -- 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.
