[sage-support] Re: resultant for aite polynomials

[Dominique Laurain]

Newbie for that math subject...but...

- there is one SAGE trac about Macaulay resultant: 
http://trac.sagemath.org/ticket/15382  ( SageDays 55?)

- from Wikipedia I just got that Macaulay resultant is working for* 
homogenoeus* polynomials in n-variables

- you can easily transform two bivariates polynomials f(x,y)  and g(x,y) to 
two homogenoeus polynomials F(x,y,z), G(x,y,z)  using extra-variable z : 
http://en.wikipedia.org/wiki/Homogeneous_polynomial and extra-condition z = 
1

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[sage-support] GAP3

[Diego A. Arcis]

Hello

I've installed SAGE 5.12 from its Source Code.

Now, I want to use GAP3 in SAGE via the following package:

http://trac.sagemath.org/ticket/8906

(this method appears hera: 
http://www.sagemath.org/doc/reference/interfaces/sage/interfaces/gap3.html.)

But, I don't know how do it.

Thanks!.

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[sage-support] Integration

[Santanu Sarkar]

I want to find the following integration.

I=integral_{t=x}^y I_{x<=y}t, where I_{x<=y} is the indicator function whose
value is 1 when x<=y, else 0.

So, value of I=(y^2-x^2)/2 if x<=y
   =0   if x>y

Does Sage  provide this kind of symbolic integration?

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