-------- Original Message -------- Subject: Re: [math-fun] Possibility puzzle Date: 2014-02-16 10:43 From: "Adam P. Goucher" <apgoucher@gmx.com> To: "math-fun" <math-fun@mailman.xmission.com>
Bill Gosper wrote:
Apparently, possibility is the intersection of probability with Boolean algebra. A certain 4th grade teacher decided to enrich Saxon Math with a few days of
What's Saxon Math? Does it involve the Angle bisector theorem?
reduced to bluffing with ambigrams: gosper.org/logic.png
I can remember an anecdote that in some Cambridge lecture on propositional logic, the lecturer wrote a few axioms such as this: (S ^ H) v N <==> (S v N) ^ (H v N) And then rotated the blackboard through 180° to give the remaining axioms. By the way, has anyone else realised that Soddy's hexlet generalises by adding extra layers of spheres? http://cp4space.wordpress.com/2014/02/15/soddys-hexlet/ Sincerely, Adam P. Goucher -------------- Frightful generalizations follow from http://mathworld.wolfram.com/BowlofIntegers.html . Related: http://www.tweedledum.com/rwg/Sodddy.htm The homeschoolers I know refer to Saxon Math as Drill and Kill, which has apparently switched from swords to pikes. --rwg