Dear Colleagues,
Next to the ODE command in Maxima, which seems to have
many missing files (and, therefore, it cannot be used), although
ODEAUX.MAC is present (and ODE2.MAC too), the
LODE2 command of the LODE package for linear ordinary
differential equations of the second order (related Maxima file
classification by Vadim, many sincere thanks for his work)
seems to have the same problem as Wolfgang has been so
kind to bring to my attention in his recent message below.
I would be extremely thankful to any colleague who would
be so kind to bring to my attention the necessary information
about the LODE command in Maxima so that, possibly, this
could be used successfully by me and my students.
Does anybody know where the missing source files of
LODE may be present? Or does anybody has ever been
able to use LODE in some way in Maxima (even partially)?
Incidentally, such situations (inability to use ODE and
LODE mainly because of missing files) could be reported
as bugs in Maxima in the related list or this is not justified?
Finally, it is understood that the actual availability of ODE
and LODE2 in Maxima would greatly increase its power
in solving differential equations of the first and the second
order. (Now mainly just ODE2, a part of ODE, and
DESOLVE are really useful.)
Many sincere thanks for your help and many thanks in
advance!
Best regards from Patras
Nikos
> ----- Original Message -----
> From: "Wolfgang Jenkner" <wjenkner at inode>
> To: "Nikolaos I. Ioakimidis" <ioakimidis@otenet.gr>
> Cc: "Maxima List" <maxima@www.ma.utexas.edu>
> Sent: Monday, February 10, 2003 3:51 PM
> Subject: Re: Contributed code (Was Re: [Maxima] Teaching)
>
>
> > "Nikolaos I. Ioakimidis" <ioakimidis@otenet.gr> writes:
> >
> > > Please, permit me to add that, from the opposite side,
> > > the LODE2 command is now present in Maxima (it is!,
> > > related comments by Vadim Zhitnikov, many sincere
> > > thanks for his work and recent comments too), which
> > > is not present in the Reference Manuals. The LODE
> > > package was prepared in MIT by S. Watanabe in
> > > 1983 and it's also useful in solving odes.
> >
> > It is defined in diffequations/pmain.mac and (as the name of the file
> > suggests) it seems to dispatch the actual solving to other files.
> > From the end of the file:
> >
> > ldf0(i):=block([],if ldsw[0,i]#y then (ldsw[0,i]:y,
> > if i= 2 then load(pconfl) else
> > if i= 3 then load(phypgm) else
> > if i= 5 then load(pivtr) else
> > if i= 6 then load(pdvtr) else
> > if i= 7 then load(pbrnch) else
> > if i= 8 then load(pnonh) else
> > if i= 9 then load(psode1) else
> > if i=10 then load(pskelp) else
> > if i=11 then load(pgptm) else
> > if i=12 then load(premap) else
> > if i=13 then load(ppow) else
> > if i=14 then load(pnpow) else
> > if i=15 then load(peqp1) else
> > if i=16 then load(pstdsp) else
> > if i=17 then load(peqp11) else
> > if i=18 then load(peqp12) ))$
> >
> > Unfortunately, most of these files are not present in Maxima. So the
> > situation is quite similar to odeaux :-(
> >
> > Wolfgang