90th Carnival of Mathematics

September 16th, 2012 | Categories: Carnival of Math | Tags:

Welcome to the 90th edition of the Carnival of Mathematics and the first one hosted by me since I handed over the administrative reigns to the good people of aperiodical.  The CoM is a great way to read about and promote mathematical blogging and has been running for over 5 years.  Hosted on a different blog each month, it covers the entire mathematical spectrum from simple mucking around with numbers right up to cutting edge research.

Writers can submit their own posts for inclusion in a carnival if they like and anyone can submit any mathy post that they’ve found interesting– ideally, something written over the last month or so to keep it fresh.

If you want to keep up with the CoM, head over to its twitter feed or the dedicated page at aperiodical.


Carnival tradition dictates that I post some trivia about this month’s edition number.  Here’s what I came up with for 90:

Neat Stuff


Puzzles and Games

  • Shecky R brings us Mind Wrenching – A self-referential logic puzzle that will give your brain cells a workout.
  • Brent Yorgey has been visualizing winning strategies for “nim-like” games and says ‘This is a post about visualizing winning strategies for certain games where players take turns removing counters from two piles.  The games make for fun games to actually play, and analyzing them can get quite interesting!’


Art and Mathematics


Tricks and Tactics


  • Mark Dominus of The Universe of Discourse gives us three posts this month: A two parter on topology and set theory (Click here for part 1 and here for part 2).


  • Dan McQuillan gives us On Trigonometric Nostalgia and says ‘This is a post about fostering a problem-solving mentality in a world where we do not even understand how our own tools work. It superimposes our nostalgia for the world we used to know with our innate curiosity, which still exists. Basic trigonometry is still fun and still relevant. Indeed, one can always ask questions and calculate!’
  • Frederick Koh takes on the dot product in Understanding MATTERS (7) saying ‘This dot product concept involving parallel vector planes is rather fundamental, yet a handful of my students are unable to figure out how things exactly work. Hence I have decided to pen this detailed explanation in the hope that it will benefit not just my charges, but other math learners as well.’
  • Augustus Van Dusen has written the first in an upcoming series of posts that will prove properties of logarthmic and exponential functions. Augustus says ‘This particular post will focus on the properties of logarithmic functions of real variables. Students in advanced placement calculus in high school and beginning college students who are not math majors are the intended audience.’

Wolfram Rule 90


Not the only game in town

The Carnival of Mathematics isn’t the only mathematical blog carnival that’s doing the tour.  There’s also the fantastic monthly Math Teachers at Play.


That’s it for the 90th Edition.  Past editions written by me include 80, 76, 74 and 73 among others.  For future editions keep an eye on @carnivalofmath and aperiodical.com