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From: ark@alice.UUCP (Andrew Koenig)
Newsgroups: comp.lang.c
Subject: Re: Implementation of pow(3m) function
Keywords: math-library exponentiation C
Message-ID: <11150@alice.UUCP>
Date: 6 Aug 90 18:47:25 GMT
References: <1990Aug2.120706.25713@bnrgate.bnr.ca> <13474@smoke.BRL.MIL> <10803@crdgw1.crd.ge.com>
Organization: AT&T Bell Laboratories, Liberty Corner NJ
Lines: 19

In article <10803@crdgw1.crd.ge.com>, volpe@underdog.crd.ge.com (Christopher R Volpe) writes:

> In article <11143@alice.UUCP>, ark@alice.UUCP (Andrew Koenig) writes:


> |>If such an
> |>implementation uses exp and log for the ordinary cases, it will
> |>almost surely not be monotonic.  That is, it will be possible to
> |>find positive x, y, and z such that y > z and pow(x,y) < pow(x,z).


> I sure hope so, since there are trivial real-life cases where this is
> true. E.g.: x=0.5, y=3, z=2. pow(x,y)=.125  <  pow(x,z)=.25


Sorry about that.  I meant x>1, y>z, z>0.
-- 
				--Andrew Koenig
				  ark@europa.att.com