Re: [PEPr] Comment on Math::Math_Polynomial (Re-proposal)

The code is mostly finished: http://www.colder.ch/repository/php/Math_Derivative/Math_Derivative.php > >Etienne: What did you have in mind for an API? >Parameter/return value is a string? Parameter is some new type/generic Math_Equation object? > > > I was thinking about parameter/return value as strings. There are two main issues: 1) lack of simplification My workaround: I've no magic method to simplify the results. A complete simplify method would be a enormous work and I can't afford it. Some simple simplification rules could be implemented though. 2) my package interprets "a^2" as "a*a" as its the most common way to express powers. But this is not the expected result when using php's evaluator (bitwise XOR operator). So: Its worthless trying to evaluate results that contains "^" using php's eval(). My workaround: implementing an eval method that internally evaluates powers before using eval() [not implemented yet] -- Etienne Kneuss http://www.colder.ch/ colder@php.net