MathGroup Archive 2006

[Date Index] [Thread Index] [Author Index]

Search the Archive

Checking the sign of a Mathematical expression


Is there a way in Mathematica to check whether an algebraic expression is
positive or negative, and a way to specify conditions on the variables in
the expression? For example, is there a way to check whether x^2 is positive
for any real x? I want to check this for a complicated
expression...basically the sign of the second derivative of a function.

Thank you very much for your help.

I am sorry for posting this message again. I had not used the appropriate
subject line and thought I should change it.

  • Prev by Date: Re: Question on Map or Apply
  • Next by Date: Re: Picture
  • Previous by thread: RE: Color Matching Functions to model human vision?
  • Next by thread: Re: Checking the sign of a Mathematical expression