Date: Dec 5, 2012 4:22 PM
Author: Joe Niederberger
Subject: Re: In "square root of -1", should we say "minus 1" or "negative<br> 1"?

Joe N says:
"Martinez"
Author of "Negative Math":
http://www.amazon.com/Negative-Math-Mathematical-Rules-Positively/dp/0691123098

I should point out that the track in this book investigating an alternative sign rule is not entirely original, Gerolamo Cardano did a similar investigation ~450 years ago (pg. 25):
http://books.google.com/books?id=3AnAcnc-yvIC&pg=PA24&lpg=PA24&dq=r+c+h+tanner+sign+rule&source=bl&ots=C6T0I1dHGc&sig=RGZTPVvFFX_MM4duVi-YcOQfm1c&hl=en&sa=X&ei=tbe_UNf9I8f00QG6l4GIBg&ved=0CDkQ6AEwAg#v=onepage&q=r%20c%20h%20tanner%20sign%20rule&f=false

Joe N