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MathGroup Archive 1993

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Ordering function

  • To: mathgroup at yoda.physics.unc.edu (mathgroup)
  • Subject: Ordering function
  • From: gt9397a at prism.gatech.edu (Daryl S. Reece)
  • Date: Tue, 9 Nov 1993 14:37:00 -0500 (EST)

    Is there a simple way to have MMA return an expression whose
terms are all of an certain order or less, when given an arbitrary
expression, the list of terms of the same order, and the order
desired?

Example

Given:
a^2 + a b^3 + a b c + (a^3 b^3 c + a b)/(a^2 + a b^2 c)
where {a,b} are the same order.  Retain 2nd order terms or lower.

Return:
a^2 + a b c + ab/(a^2+a b^2 c)

Thanks,
-- 
Daryl Reece

Internet: dreece at cad.gatech.edu  or gt9397a at prism.gatech.edu

School of Aerospace Engineering
Georgia Institute of Technology
Atlanta, GA 30332-0150





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