Mathematicians are constantly pushing the boundaries of what is possible in the field of mathematics. One recent breakthrough comes from Richard Evan Schwartz of Brown University, who tackled the problem of constructing a polyhedral torus from scratch. This torus, a doughnut-shaped mathematical object, is not smooth like a bakery doughnut but instead jagged with many faces, each of which is a polygon.
Schwartz’s study, posted to a preprint server in August 2025, focused on finding the minimum number of vertices needed to make polyhedral tori with a property called intrinsic flatness. He discovered that eight vertices are necessary for this construction, debunking the idea that seven vertices could suffice. His findings have shed light on a long-standing mathematical question that had puzzled experts for years.
The concept of intrinsic flatness is crucial to understanding Schwartz’s work. While intrinsically flat surfaces may seem similar to flat surfaces like a piece of paper, they have unique properties that make them distinct. Intrinsically flat polyhedral tori have the same dimensions as tori that have been flattened, meaning that the angle sums around each vertex add up to 2π everywhere.
Schwartz’s journey to solving this problem was not without its challenges. Initially hesitant to take on the problem due to its complexity, he was eventually convinced by colleagues who believed in his ability to crack the code. With a combination of traditional mathematical investigation and computational methods, Schwartz was able to find a solution that showcased his unique skills in blending different approaches to problem-solving.
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