## 541 Reputation

14 years, 205 days

## alais of RootOf in procedure fails to wo...

Maple
Hi,all, I found a weird problem. When I use alias of RootOf in a procedure, it seem that it cannot work correctly. The code is as following: > restart; > cf := proc (n, ir) local P; alias(x = RootOf(ir)); P := evala(Expand(x^4)) mod 2; print(P); end; >cf(4,x^4+x+1); x^4 ---------------------> should be x+1 However, when I use it in seperate commands, it works fine. > restart; >alias(x = RootOf(x^4+x+1)); >P := evala(Expand(x^4)) mod 2; >print(P); x+1 I have no idea what is wrong here Thanks Gepo

## implementation F4 computing Groebner bas...

Maple

Hi, all,

I want to implement F4 computing Groebner basis in maple. However, when I read the paper described the F4 algorithm, it is terribly difficult to understand that example and I am pretty much sure there are mistakes in that paper.

Do you guys have some advice or documents to let me really get through the F4 algorithm?

Many thanks.

gepo

## how to obtain the runtime of a procedure...

Maple
Hi, guys, I want to compare the performance of procedures which are written by myself. But I have no idea how to get the runtime of a procedure. Thanks in advance.

## How to sort variables in Gorebner Basis?...

Maple
Hi, all, I want to sort hundreds of variables which are read from a file. Basically, this is what I want to use: Basis(L,plex(V)); "L" is a variable of list which is read froma file. This part is done. "V" is a variable of list which is read from a file. Well, this part is not done yet. Because I have no idea how to do this. For example, in a file, there are some variables: a, b ,c,d,e,f,g and I can read them into a variable of list: V=[a,b,c,d,e,f,g]; But the problem here is you cannot use it as plex(V) in Groebner basis package. Any suggestions? Thanks in advance. Gepo

## list all irreducible polynomial and prmi...

Maple
Hi, I am wandering whether are some functions to compute all irreducible polynomial and prmitive polynomial over Galois field. For example, I want to all the irreducible and prmitive polynomials of GF(2^5). are there such commands to perform that? thanks
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