Skip to main content
Roots of Unity

Roots of Unity

Mathematics: learning it, doing it, celebrating it.

Big Numbers Are Big

SOS, 181418, appears starting at the 1,377,767th digit of pi. Image: xkcd. Today I have a piece in Slate about that pi meme that's been going around.

April 17, 2013 — Evelyn Lamb

91 Is April Fooling You

7 × 13 pieces of beach glass found on the shore of Lake Michigan and arranged on my coffee table. Rather appropriately, April 1st is the 91st day of the year, at least in non-leap years such as 2013...

April 1, 2013 — Evelyn Lamb

I'm Not Celebrating Pi Day This Year

  A variety of pies celebrating the number pi. Source: flickr/djwtwo. On the one hand, I like Pi Day because I get to eat pizza and/or pie, and I like things that get people excited about math, but on the other hand, I'm an adult, and I get to eat pizza and/or pie whenever I want, Pi Day or no...

March 14, 2013 — Evelyn Lamb

Time in 298 Words

Last year, in the inaugural Flame Challenge, Alan Alda and the Center for Communicating Science at Stony Brook University challenged scientists to explain what a flame is to an 11-year-old...

March 10, 2013 — Evelyn Lamb

Wrong in Public: the 4-Color Theorem Edition

Wrong in Public is a new, hopefully very occasional, series on Roots of Unity. I don't like being wrong in public, but sometimes I make a mistake in a post, and sometimes mistakes are interesting...

March 5, 2013 — Evelyn Lamb

Having Fun with the 4-Color Theorem

A four-coloring of most of Europe. The 4-color theorem is fairly famous in mathematics for a couple of reasons. First, it is easy to understand: any reasonable map on a plane or a sphere (in other words, any map of our world) can be colored in with four distinct colors, so that no two neighboring countries share a color.Second, computers were instrumental in the proof of the four-color theorem...

March 1, 2013 — Evelyn Lamb

Two Evelyns and a Katie: a Snapshot from AAAS

Evelyns from Texas at the AJAS poster session. (Left: yours truly. Right: Evelyn Ho.) When I was at the American Association for the Advancement of Science meeting in Boston last week, I popped by the American Junior Academy of Science poster session featuring the work of high school scientists...

February 22, 2013 — Evelyn Lamb

Joint Math Meetings Wrap-Up

I wrote a few blog posts while I was at the Joint Mathematics Meetings back in January, but now you can read some more comprehensive coverage of the meetings at the American Mathematical Society website...

February 16, 2013 — Evelyn Lamb

Blog Index

Scroll To Top

Memorial Day Flash Sale

Memorial Day Flash Sale

How Smartphones Affect Mental Health