Alan Turing and the Countability of Computable Numbers Turing’s methodology was unique: he imagined hypothetical machines that could perform complicated mathematical tasks in a deterministic manner, in the way computers do today. In this way, he inadvertently kickstarted the entire field of modern computer science… Adam A. Smith University ofRead More →

The Battle of Numbers Our topic is the game called rithmomachia or rithmomachy—literally, the battle of numbers… Ursula Whitcher AMS | Mathematical Reviews, Ann Arbor, Michigan This month, we’re going to explore a very old—indeed, medieval—educational game and correct a mathematical error in a sixteenth-century game manual. But before weRead More →

The Once and Future Feature Column We’re going to look back at the Column’s history, revisit some of our favorite columns, and talk about what comes next. Spoiler alert: We’re recruiting new columnists! Ursula Whitcher AMS | Mathematical Reviews, Ann Arbor, Michigan The number 24 has many charming properties. ForRead More →

In Praise of Collaboration Take a look at an extraordinary collaboration in discrete geometry and related geometrical mathematics, the collaboration of Branko Grünbaum and Geoffrey Colin Shephard. Joe Malkevitch York College (CUNY) Introduction Point and line do many activities together—their collaborations create a rich texture for many mathematicians and geometers,Read More →