YUMS
Differential operators, algebraically
Taffy machines, braids and fibrations: topology and dynamics in dimensions 1, 2 and 3.
Geometry of spheres with conical singularities
Apollonian circle packings
Symmetries of surfaces from linear algebra
Continued Fractions, Geometry, and Dynamics
Matroids
Chip-firing games on graphs
Hilbert's third problem and the power of tensor product
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