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
Lines: 18
Message-ID: <34A3C9F1.703A1284@a.crl.com>
References: <19971214071301 DOT CAA28133 AT ladder02 DOT news DOT aol DOT com> <670a5n$ibe AT freenet-news DOT carleton DOT ca> <3493DBDF DOT BA86224 AT cornell DOT edu> <349442D2 DOT 71F0 AT indiana DOT edu> <34944E57 DOT 55FF5A69 AT cornell DOT edu>
NNTP-Posting-Host: a116004.stl1.as.crl.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk

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