On Thu, Jul 9, 2009 at 3:57 PM, Priit Laes<plaes...@gmail.com> wrote:
>
> Ühel kenal päeval, K, 2009-07-08 kell 19:04, kirjutas David Joyner:
>> On Wed, Jul 8, 2009 at 4:31 PM, Priit Laes<plaes...@gmail.com> wrote:
>> >
>> > Hey,
>> >
>> > For the past week I have been trying to figure out how to implement
>> > solver for most basic types of PDEs and now it is finally time to show
>> > something:
>> >
>> > In [1]: from sympy import *
>> > In [2]: from sympy.solvers.solvers import *
>> > In [3]: from sympy import Derivative as D
>> > In [4]: t,x,y,z = symbols('txyz')
>> > In [5]: a = Symbol('a', Real=True)
>> > In [6]: u = Function('u')
>> > In [7]: eq = Eq(D(u(x, t), t) + a*D(u(x, t), x))
>> > In [8]: eq
>> > Out[8]:
>> > d d
>> > a⋅──(u(x, t)) + ──(u(x, t)) = 0
>> > dx dt
>> > In [9]: pdesolve(eq, u(x, t))
>> > Out[9]: [x - a⋅t]
>
>
> What would be the best way of naming/defining arbitrary functions?
> F1(), F2() and so on?
>
> And is it ok to just use F1, F2 = map(Function, 'F1 F2') ??
I was wondering the same thing! I don't know the best way but I think
it should be
consistent with the way you create new variable names for the arbitrary
constants which arise in the general solution to an ODE without
initial conditions.
>
>
> >
>
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