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:
Author of "Negative Math":

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):

Joe N