# Roots of Unity

Mathematics: learning it, doing it, celebrating it.

## 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

## Romance, Continued Fractions, and You

A continued fraction....of love. About a month ago, I awoke from a dream totally psyched about the brilliant blog post I would write for Valentine's Day.

February 14, 2013 — Evelyn Lamb

## What Are Roots of Unity?

This blog is called "Roots of Unity" because in 2004 I thought it would be an awesome band name. Not the cover of my band's first album. Image courtesy of Gregory A.

February 7, 2013 — Evelyn Lamb

## Try Your Hand at Hands-on Math

On Sunday, I wrote about my public statistics session at ScienceOnline. Today, I'll tell you a little about my other session, Hands-on Math, co-moderated by Matthew Francis.

January 29, 2013 — Evelyn Lamb

## How Should We Write about Statistics in Public?

A member of the order Lepidoptera enjoys my favorite green space in Chicago, Garfield Park Conservatory. There's a 50 percent chance that this is a below-average lepidopteran.

January 27, 2013 — Evelyn Lamb