(j3.2006) "Much Ado About Nothing's Sign Bit"

Van Snyder Van.Snyder
Wed Feb 3 22:18:19 EST 2010

In 04-216, Walt Brainerd (actually James Giles) proposed more careful
handling of negative zero.

If you want some deeper insight into why this is useful, take a look at
"Branch Cuts for Complex Elementary Functions, or Much Ado About
Nothing's Sign Bit" by Velvel Kahan in "The State of the Art in
Numerical Analysis," (eds. Iserles and Powell), Clarendon Press, Oxford,

A preliminary version of the paper is available online at

Van Snyder                    |  What fraction of Americans believe 
Van.Snyder at jpl.nasa.gov       |  Wrestling is real and NASA is fake?
Any alleged opinions are my own and have not been approved or
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