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Math Forum » Discussions » sci.math.* » sci.math.symbolic.independent

Topic: factorising
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Robert Spalek

Posts: 3
Registered: 12/8/04
factorising
Posted: Dec 9, 1996 10:28 AM
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hello everyone,
I would like to write some simple program for algebraic manipulation. I can
imagine, how to represent expression, how to expand them, or how to
differentiate them.
i can find a root of a polynomial too (x^3+a*x^2-x+1 etc.)

but i didn't discover, how to factor multivariate polynomial.
at example, lets expand (x*x + x*z + a*b)* (z*a + b*x + x*z) and
forget previous expression. how would you factor it?
i wondered about trying all the possibilities of arranging the
variables into the parantheses and then compute the coefficients, but
i don't know, which possibilities shall i try. at example:
x^10-1=(x-1)(x^9+x^8+...+x^2+x+1)
the expression on the left side has 2 parts and on the right side
2 & 9 parts.

i wouldn't like to study difficult source code of MuPAD or ecalc.
if anybody knows any literature about it (i prefer a computer file
rather than book), please write me.
--
Robert Spalek; NoSense
e-mail: robert@atrey.karlin.mff.cuni.cz
mobil: 0602/435889





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