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[Paul Zarucki <address@hidden>]

Hi lq,

If I type your commands in Texmacs 1.0.7 on Debian 4.0 (Maxima version 5.10.0) I get the following message:

**************
Maxima encountered a Lisp error:

  Error in PROGN [or a callee]: Caught fatal error [memory may be damaged]

Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.
**************

I used a terminal window to start Texmacs but there is no error message in the terminal window and CPU usage is normal (very low). I attach a PDF of my Maxima session in Texmacs.

I also typed your commands into the terminal interface of Maxima and get the following error message:

**************
Maxima encountered a Lisp error:

 Error in PROGN [or a callee]: Caught fatal error [memory may be damaged]

Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.
**************

which is identical to the message in Texmacs.

Regards,

Paul.


lq wrote:

Hi everyone:

I am using Arch Linux and have texmacs(version 1.0.7) installed using
pacman.
Today ,I want to derive the *Runge�CKutta methods** *with help of the maxima.
After typing a command with a quite long output ,texmac only output:

** <stack-overflow|#f|Stack overflow|#f|#f>

with a lot of CPU used.

And the output
  

/usr/share/TeXmacs/progs/convert/rewrite/tmtm-tidy.scm:42:28: In
procedure equal? in _expression_ (== x (quote #)):
/usr/share/TeXmacs/progs/convert/rewrite/tmtm-tidy.scm:42:28: Stack
overflow
    

in terminal window.

The commands I run are below:
  

K[1]:g(t,y);
A:taylor(g(t+h[t],y+h[y]),[h[t],h[y]],0,4);
h[t]=mu[21]*h;
h[y]=mu[21]*h*K[1];
K[2]:A,%o3,%o4,ratexpand;
h[t]=(mu[31]+mu[32])*h;
taylor(h*(mu[31]*K[1]+mu[32]*K[2]),h,0,4);
h[y]=taytorat(%o7);
A,%o6,%o8;
    

The last one is which caused problem.
This must be a bug of texmacs , beacause there is no problem when I run
these commands in original terminal interface of
maxima or change the last command to
  

A,%o6,%o8$
    

Does anyone know how to fix?


lq




  

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Attachment: runge-kutta.pdf
Description: Adobe PDF document