I am -1 on having a Wavefunction class. The reason is that a
wavefunction is just a plain old function. There is no additional
logic needed over a regular function. But I want to understand what
you are using these functions for. I can think of two types of
functions needed in quantum:
* An undefined function for use in representing an unknown or abstract
state: <x|psi> => psi(x). For this I would just use
Function('psi')('x'). The name of the state (psi) can just be used
for the name of the function.
* A function for a known quantum state like the particle in a box.
For this case, we should just return the special function, such as
sin(n*pi*x/L), etc.
Can you clarify how the functions you are using relate to these two cases?
Cheers,
Brian
On Sat, Jun 11, 2011 at 2:56 PM, Tomo Lazovich <[email protected]> wrote:
> Lambda seems to work for me except for one thing.
>
> I have a class Wavefunction for representations of states in continuous
> bases. It subclasses Lambda and provides some additional convenience
> functions. One thing it would like to do internally is calculate
> self.expr*conjugate(self.expr). I've found, however, that because the Lambda
> uses dummy variables internally, even if I initialize the function with a
> symbol set to real=True, that doesn't carry over to the internal expression
> and so the conjugate isn't very well simplified. Is there a way to get
> around this?
>
> Thanks!
>
> On Fri, Jun 10, 2011 at 9:19 PM, Aaron Meurer <[email protected]> wrote:
>>
>> If you just want a placeholder to keep args, use UndefinedFunction.
>> If you want it to have any more advanced functionality at all, create
>> a subclass of Function. I admit I don't know anything at all about
>> what you are doing, but it's very likely that the case is the latter.
>>
>> Aaron Meurer
>>
>> On Fri, Jun 10, 2011 at 5:08 PM, Vinzent Steinberg
>> <[email protected]> wrote:
>> > On 10 Jun., 02:08, Brian Granger <[email protected]> wrote:
>> >> Definitely use the existing Function stuff in sympy. I am not sure
>> >> you will even have to subclass to do this.
>> >
>> > There is also UndefinedFunction (BTW, I think we should rename it to
>> > AbstractFunction or similar) if you want a rather abstract function.
>> > If you want to implement something like sin, you should probably use
>> > Function.
>> >
>> > Vinzent
>> >
>> > --
>> > You received this message because you are subscribed to the Google
>> > Groups "sympy" group.
>> > To post to this group, send email to [email protected].
>> > To unsubscribe from this group, send email to
>> > [email protected].
>> > For more options, visit this group at
>> > http://groups.google.com/group/sympy?hl=en.
>> >
>> >
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "sympy" group.
>> To post to this group, send email to [email protected].
>> To unsubscribe from this group, send email to
>> [email protected].
>> For more options, visit this group at
>> http://groups.google.com/group/sympy?hl=en.
>>
>
>
>
> --
> Tomo Lazovich
> Harvard College '11
> 278 Winthrop House Mail Center
> Cambridge, MA 02138
>
> --
> You received this message because you are subscribed to the Google Groups
> "sympy" group.
> To post to this group, send email to [email protected].
> To unsubscribe from this group, send email to
> [email protected].
> For more options, visit this group at
> http://groups.google.com/group/sympy?hl=en.
>
--
Brian E. Granger
Cal Poly State University, San Luis Obispo
[email protected] and [email protected]
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sympy?hl=en.
