Evan Chen

works on

alternating permutations 1 Euler numbers 1 noncommutative symmetric functions 1 record compositions 1 sprout sequences 1

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math.DS2026

On the paucity of lattice triangles

David Kurniadi Angdinata, Evan Chen, Ken Ono +2

A rational triangle $T$ (one whose angles are rational multiples of $I ¨ $ ) unfolds to a translation surface $(X_{T}, I ¨ _{T})$ . The lattice triangle problem asks to classify those $T$ for…