I'm trying to find the greatest common divisor of two functions with characteristic=7:

with(Algebraic):
GreatestCommonDivisor(x^4+x^3+4*x^2+4*x+5,x^3+x^2+5*x+5,'characteristic'=7);

This gives the answer as (x+4) which is a common divisor but it is not the greatest. From working by hand, I've found that (3x+5) is the gcd.

Why is maple giving the wrong answer?

Hi,

I know it is possible to find a basis from a set of vectors using the 'basis' command but is it possible to find a basis from a set of matrices?

How can I plot sin(y)>0, x>0 ?

I've tried using inequal:
with(plots):
inequal({sin(y)>0,x>0}, x=-2*pi..2pi, y=-2*pi..2*pi);

but I get the message 'unable to compute coeff' .

Thanks in advance.

Is it possible to solve piecewise equations in maple? All I get is 'warning, solutions may have been lost'.

solve((piecewise(x<0,x,x>=0,x^2)=0));

Thanks.

Maple 11:

I've made a list of all of the elements of the symmetric group s_6:

> S_6 := permgroup(6,{[[1,2]],[[1,2,3]],[[1,2,3,4]],[[1,2,3,4,5]],[[1,2,3,4,5,6]],[[1,2],[3,4]],[[1,2,3],[4,5]],[[1,2,3],[4,5,6]],[[1,2,3,4],[5,6]]});
> ident := permgroup (6, {[]} ):
> cosets(S_6, ident);

How do I extract certain types of cycle structures (e.g (**)(**)) from the list?

Thanks in advance.