Hi Ted, As you suggested I opened a ticket for this issue:
https://issues.apache.org/jira/browse/MATH-250 :) - Bernhard Ted Dunning schrieb: > Reasoning purely by symmetry, doesn't it seem that where you are headed here > is toward an extended rational polynomial class that handles rational > polynomials of a base variable and simple functions of a base variable (such > as trig functions, log and exp)? > > If so, then having some kind of unified class would probably be a good > thing. You could pretty easily support the same functions as the current > Polynomial class (derivative, multiply, add, negate and so on). The > question of log(-1) and sqrt(-1) is likely to come up, but if you add a > convention for complaining about these, then you should be good to go. > > The next step is to file a JIRA where discussions like this can have a home. > > On Tue, Mar 17, 2009 at 9:01 AM, Bernhard Grünewaldt < > bernh...@gruenewaldt.net> wrote: > >> Hi, >> >> I used already the classes of the analysis package: >> http://commons.apache.org/math/userguide/analysis.html >> >> There is already a fine class for Polynomial Functions which can calculate >> the derivation: >> >> PolynomialFunction.derivative() >> >> >> I would like to suggest a class called "RationalFunction" which can do >> almost the same but for (you guessed it) Rational Functions. >> >> Suggested methods are: derivative() , add(RationalFunction r), a.s.o. >> >> http://en.wikipedia.org/wiki/Rational_function >> >> If this is something which you would like to have I will start coding it >> to provide a patch. >> >> The next thing is "Trigonometric Functions" and their derivatives: >> >> >> http://en.wikipedia.org/wiki/Trigonometric_function_derivations#Derivatives_of_trigonometric_functions >> >> It would also be nice to have classes for that type of function. >> >> >> - Bernhard >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org >> For additional commands, e-mail: dev-h...@commons.apache.org >> >> > > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
