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math.HO2026
The {\em 4DLO} and other tubing models of symmetry
Chaim Goodman-Strauss, Eugene Sargent
The {\em Four-dimensional Light Orchestra} or {\em 4DLO} was an interactive sculpture at the National Museum of Mathematics (MoMath) from November 20, 2025 through January 2026, il…
math.HO2024
Remark on Pascal's Triangle
Chaim Goodman-Strauss
Through a series of elementary exercises, we explain the fractal structure of Pascal's triangle when written modulo using an 1852 theorem due to Kummer: A prime divides $\d…