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Inequalities

• Subject: [mg2471] Inequalities
• From: <rizzi at img.fr>
• Date: Mon, 13 Nov 1995 03:28:19 GMT
• Approved: usenet@wri.com
• Distribution: local
• Newsgroups: wri.mathgroup
• Organization: C.I.C.G. , Grenoble
• Sender: daemon at wri.com ( )

Let expr be an expression which depends on a and b.
How can I check the sign of expr (e.g. positive) when
a and b satisfy some inequality constraints?

Example:  f=(-9 - 23*c4 - 19*c4^2 - 5*c4^3 + 9*nu + 21*c4*nu + 15*c4^2*nu)

Check the sign of f when  -1 < c4 < Infinity and 0<= nu <= 0.5

Thanks in advance,
 Egidio

rizzi at geo2.img.fr