# Student-professor duo share love for math, puzzles

An arrowgram is a type of mathematical puzzle consisting of letters connected by arrows. The arrows point from one letter to another. Some arrows are labeled with numbers, and a rule based on transitivity (a relationship between three elements such that if the relationship holds between the first and second elements and between the second and third elements, it necessarily holds between the first and third elements) is used to label the rest of the arrows.

“My motivation to invent arrowgrams was to find a way to communicate some aspects of my scholarship to people besides mathematicians,” Price said. “I was looking to have people do math that was fun.”