RLessard

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MaplePrimes Activity


These are questions asked by RLessard

 
 1)  Copy/paste problem .
 
 Looks like Maple is not able to copy/paste the output
 from a summation command . Look at my example .
 I have to use the  " lprint " command .
2)   Mysterious small box character .
 
 Suppose I want to edit a command . I want to replace a character with a left bracket
 (or right bracket or left accolade but strangely not the right accolade).
 I put the cursor on the character and type the left bracket (or right...) .
 The left bracket ( or right ...)  is inserted . Now when I try to delete the character,
 a small box appear . The  character I am trying to delete is shifting to the right .
  Like  I said , just a little annoying .
 
3)  Open file problem .
 
 The first file I open in Maple with the  ctrl-o command , the "open file window" appears in
  the center of the screen . All the others files I am opening , the "open file window"  show up
  in the bottom left corner , top center or top right corner ... randomly .
  Very annoying on a 27" screen . For this last one ,I am not shure  if it is a Maple 2018 problem
   or a Windows 10 64 bits problem . I have few programs in my computer .
  When I use Microsoft Paint or Wordpad ,I don't see this problem .
 
  I don't know if somebody else can confirm those annoying things . If I am not the only one
  then I am hoping the next updates or versions will fix that .
 
    Thanks !
 
Hi !
I made a program that solves a series of system of linear equations of increasing dimension.
Equations with rational numbers. I have a list of equations "liseq1" and a list of variables "lisvar1".
I use the following command :
 
solve(liseq1,lisvar1) ;
 
When the equation system reaches dimension 32, Maple gives me the following error message :
 
"Error, (in LinearAlgebra:-Modular:-IntegerLinearSolve) invalid arguments to iratrecon" .
 
It is an overdetermined system with 33 equations and 32 unknowns .
The variables are defined with the command:
 x: = array (0..31) ;
 
I managed to work around the problem by replacing the variables with the following commands :
 
lissub: = seq (x[i] = x||i, i = 0..31) ;
lisvar2: = subs(lissub, lisvar1) ;
liseq2: = subs(lissub, liseq1) ;
solve (liseq2, lisvar2);
 
If you run the file I sent, Maple sometimes gives the desired answer but in a random way
because if you run the last 3 lines in a different order you will get the answer or the
error message .
 
Something remains in memory. Sorry, but it's a bug.
I have Windows 10, 64 bit with Maple 2018.2.
Regards .
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