From:	Weiqi Gao <weiqigao AT a DOT crl DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Dual monitors with rhide?
Date:	Fri, 26 Dec 1997 09:14:57 -0600
Organization:	Spectrum Healthcare Services
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A. Sinan Unur wrote:
> 
> i know this is off-topic, but i hate seeing my supposedly humorous
> responses ruined this way ;-) send flames by e-mail please.
> 
> a twice differentiable function is said to be (strictly) concave if its
> second derivative is (negative) nonpositive, and (strictly) convex
> (which is what you are calling 'upwards concavity') if its second
> derivative is (positive) nonnegative.

This is definitely a "White European Male" point of view, as people in
the U.S. would call them.  Here in the U.S., we have been successful in
revise this definition for a diverse audience: a curve "concaves up" if
it bends upward, and "concaves down" if it bends downward.

--
Weiqi Gao
weiqigao AT a DOT crl DOT com

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