Daniel Lemire wrote:
> I get the following weird error message... anyone can explain what it means?
>
> (C1) ode2(d(y(x),x)=1/y(x),y(x),x);
>
> Error: The variable $FEATURE is unbound.
> Fast links are on: do (si::use-fast-links nil) for debugging
> Error signalled by MACSYMA-TOP-LEVEL.
> Broken at MACSYMA-TOP-LEVEL. Type :H for Help.
> MAXIMA>>
>
Try
ode2('diff(y(x),x)=1/y(x),y(x),x);
it works.
On the other hand
ode2(d(y(x),x)=1/y(x),y(x),x);
indeed gives an error. This must
be fixed.
--
Vadim V. Zhytnikov
<vvzhy@mail.ru>
<vvzhy@td.lpi.ac.ru>
<vvzhy@yandex.ru>