[Maxima] Arguments of operatorp
jerome.laurens at u-bourgogne.fr
Thu Jun 21 02:07:33 CDT 2012
Le 20 juin 2012 à 17:21, Robert Dodier a écrit :
> On 2012-06-20, Jérome Laurens <jerome.laurens at u-bourgogne.fr> wrote:
>> in the meanwhile, I found one way to walk an expression tree
>> but it was not as convincing as your suggestions.
>> Being new to maxima language and lisp,
>> I must change some of my habits ;-)
>> For the short story, my goal is to compute solutions of some systems
>> of partial differential equations in the sense of distributions. No
>> Laplace transform allowed.
> Sorry, I wasn't clear. Let me try again.
> There are Maxima functions to walk an expression tree and perform some
> operation on designated terms. What is the operation you are trying to
> carry out?
- integration by parts on unbounded domains
- change of variables in 2D
for the soft side, and for the hard side
Given an expression of the form
change g according to f and the integral bounds.
Of course, this must apply to subexpressions of bigger ones.
The initial mathematical problem may evolve to better fit maxima commands.
One of the concrete question I came to was
With subst variants we can make a substitution only occur in one specific argument,
for example only in the lower bound of an integrate command.
But is there a tool to find the number arguments of substpart based on general criteria,
for example "the lower bounds of the integrals subexpression in variable 't'"
While reading the doc, I may have missed some kind of find command...
More information about the Maxima