Date: Oct 25, 1995 5:14 PM
Author: Ted Alper
Subject: RE: RE:Math Prefixes

I haven't been keeping up with the nctm-l mailing list recently

(so many messages! and my own job is quite busy lately. I had hoped

to write something clarifying Brouwer and intuitionism and how little

the subject has to do with the "constructivism" discussed here, but by the

time I get to it, the topic will be long forgotten.) -- so I apologize

if this reference has been cited already.

Anyway, on the subject of calendars and mathematics, my friend Ilan

Vardi had a chapter in his book Mathematica Recreations (later

retitled something like "Computer recreations in mathematics" -- to

appeal to an audience a bit broader than Mathematica users), published

by Addison Wesley on "mixed radix systems" which in effect, calendars

are. He includes (if I remember correctly) information on Indian,

Mayan, Julian/Gregorian, Jewish, Islamic and French Revolutionary

calendars (though he omits the Italian Fascist calendar -- does anyone

know the structure of it? Did they just rename the months?) and puts

them in an interesting mathematical framework.

Ted Alper

alper@ockham.stanford.edu