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[lq <address@hidden>]

Hi Paul,

The difference may be because I load the pdiff package in my maxima-int.mac;

Without pdiff loaded,my maimxa(5.17.1) just throw out a lot of errors I
cannot understand(See in test-nopdiff.pdf).
That's also the situation running in original test interface;

With pdiff loaded,that's what I talked in the first post.(See
test-withpdiff.pdf).

Thanks very much for your help.

lq

Paul Zarucki 写道:
> 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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>

K[1]:g(t,y);
A:taytorat(taylor(g(t+h[t],y+h[y]),[h[t],h[y]],0,4));
ev1:h[t]=mu[21]*h;
ev2:h[y]=mu[21]*h*K[1];
K[2]:ev(A,ev1,ev2,ratexpand);
ev1:h[t]=(mu[31]+mu[32])*h;
taylor(h*(mu[31]*K[1]+mu[32]*K[2]),h,0,4);
ev2:h[y]=taytorat(%);
A,ev1,ev2$

Attachment: test-nopdiff.pdf
Description: Adobe PDF document

Attachment: test-withpdiff.pdf
Description: Adobe PDF document