Advanced Search

Christian Wolinski

1315 Reputation

14 Badges

18 years, 85 days
Contact Christian Wolinski

MaplePrimes Activity


These are questions asked by Christian Wolinski

Arrow operator....

Christian Wolinski 1315 Maple
December 02 2016
1 5

Is there a difference between scoping rules for regular procedures and for arrow operators?

Differences in versions....

Christian Wolinski 1315 Maple
compatibility version
December 01 2016
0 4

I've posted  a code for a procedure, but it seems it does not execute with other versions of Maple the way it does with my version (5.4). Here is the link. I am curious to identify within the procedure code the cause of this divergence. Note: in 5.4 the code is preceded with readlib(eliminate).
 

Sphere plotting....

Christian Wolinski 1315 Maple
plot sphere
November 26 2016
4 3

   Consider a surface of the unit sphere about the origin, intersecting the volume of the cube [-a..a,-a..a,-a..a] 0<a<1.  What is the best Maple method to plot this surface with a direct mapping, that is without use of implicit plotting over a volume or rejecting grid points?

Error, too many levels of recursion...

Christian Wolinski 1315 Maple V
eval recursion environment
September 15 2016
0 5

In Maple V, Release 4 (1996):

 

T:=table():
i:=1:N:=5000;

for i from i to N  
do
   T[i]:=T[i+1]:
   T[i+1]:=1;
   eval(T[1]);
od:
print(i);

for i from i to N  
do
   T[i]:=T[i+1]:
   T[i+1]:=1;
   eval(T[1]);
od:
print(i);

I receive this output:

N := 5000
Error, too many levels of recursion
3607
5001

Can You explain this occurence, as well as the following one:

In Maple V, Release 4 (1996):

 

T:=table():
i:=1:N:=5000;

for i from i to N  
do
  T[i]:=T[i+1]:
  eval(T[1]);
od:
print(i);
 
for i from i to N  
do
  T[i]:=T[i+1]:
  eval(T[1]);
od:
print(i);;

gives:

N := 5000
Error, too many levels of recursion
3607
Error, too many levels of recursion
3607

How does one control allowance for recursion depth?

What is the expected correct outcome of ...

Christian Wolinski 1315 Maple V
assign environment
August 31 2016
3 0

In Maple V, Release 4 (1996):

 

_EnvX:=0; b:=0; proc() global b; print(_EnvX, b); assign('_EnvX=1, b=1'); print(_EnvX, b); end();
_EnvX:=0: b:=0: proc() global b; print(_EnvX, b); _EnvX:=1; b:=1; print(_EnvX, b); end();;

gives:
                                 0, 0
                                 0, 1

In newer Maple:

 

_EnvX:=0; b:=0; proc() global b; print(_EnvX, b); assign('_EnvX=1, b=1'); print(_EnvX, b); end proc();
_EnvX:=0: b:=0: proc() global b; print(_EnvX, b); _EnvX:=1; b:=1; print(_EnvX, b); end proc();

?

First 7 8 9 10 11 Page 9 of 11