REU 2021 Photo Gallery It's Ursinus REU 2021! Sponsored by NSF The projects. Autographs Ursinus REU summer 2021 Ursinus REU summer 2021 The hidden periodic motion team at work. Ursinus REU summer 2021 Ursinus REU summer 2021 Ursinus REU summer 2021 REU farewell dinner View from the top of the IDC. Ursinus REU summer 2021 Ursinus REU summer 2021 Ursinus REU summer 2021 Ursinus REU summer 2021 Ursinus REU summer 2021 Ursinus REU summer 2021 p-adic valuations of sequences Representation of Lie algebras Amplification of Hidden periodic motions in 3D videos Discrete Morse theory Kristen, Rachel, and Emily. This is also something. This was... something. REU’s angels. Ursinus REU summer 2021 Ursinus REU summer 2021 John explains Lie algebras. Ursinus REU summer 2021 It's a cocktail party! Rachel shows us a finite part of an infinite tree. Emily explains the “big theorem.” According to Stephen, the p=3 case yields a finite tree.