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Christian Wolinski

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20 years, 207 days
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These are questions asked by Christian Wolinski

What is the expected correct outcome of ...

Christian Wolinski 1650 Maple
typematch
November 05 2017
1 2
 

typematch({2}, set({x :: integer, y :: even}), 's'), s;

 

Arrow operator....

Christian Wolinski 1650 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 1650 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 1650 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 1650 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?

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