"Richard Hennessy" <rich.hennessy at verizon.net> writes:
> We have,
>
> gradef(pwdelta(x), diff_pwdelta(1,x))$
> gradef(diff_pwdelta(n,x), 'und, diff_pwdelta(n+1,x))$
>
> <snip>
>
> diff(pwdelta(s*x-v),x,4); // problem below
> -> diff_pwdelta(4,s*x-v)*s^4
>
> This last line should be
> diff(pwdelta(s*x - v), x, 4);
> -> diff_pwdelta(4, s*x-v)
> by definition of diff_pwdelta().
>
> I don?t know a workaround for this one.
I'm a bit confused. Why are you trying to define a "diff_pwdelta"
function at all? Can't you just use the noun form 'diff(pwdelta...) ?
Rupert
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