Posted by: Gary Ernest Davis on: August 16, 2011

On the last Twitter #mathchat there seemed to me to be a fair amount of confusion about what constitutes a fraction. Commonly, people were treating any expression of the form as a fraction, no matter what were . Confusion about fractions is something I’ve experienced in many places, in many contexts. The confusion seems to […]

Posted by: Gary Ernest Davis on: February 1, 2010

Arithmetic on names Algebra is powerful because it allows us, among other things, to do arithmetic on the names of variables or unknown quantities and find specific numerical values for those variables or unknowns. If, as some people assert (wrongly, in my view) that mathematics is only a language, then it is a very peculiar […]