Yep:
>>> (sinh(x)).replace(sinh, lambda arg: exp(arg)/2)exp(x)/2
On Thursday, October 31, 2013 6:14:59 PM UTC+4, Aaron Meurer wrote:
>
> Use replace to replace functions.
>
> Aaron Meurer
>
> On Oct 31, 2013, at 6:48 AM, Boris Kheyfets <kheyf...@gmail.com<javascript:>>
> wrote:
>
> I have a large argument, so I'd rather neglect exp(-x) in the definition
> of sinh. How do I substitute sinh by 1/2*exp ?
>
> I tried .subs({sinh: 0.5*exp}) and .subs({2 * sinh: exp}) but it doesn't
> work: TypeError: unsupported operand type(s) for *: 'int' and
> 'FunctionClass'.
>
> --
> You received this message because you are subscribed to the Google Groups
> "sympy" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to sympy+un...@googlegroups.com <javascript:>.
> To post to this group, send email to sy...@googlegroups.com <javascript:>.
> Visit this group at http://groups.google.com/group/sympy.
> For more options, visit https://groups.google.com/groups/opt_out.
>
>
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to sympy+unsubscr...@googlegroups.com.
To post to this group, send email to sympy@googlegroups.com.
Visit this group at http://groups.google.com/group/sympy.
For more options, visit https://groups.google.com/groups/opt_out.
