Rachmiel "Rocky" Klein

I am a 4th year PhD student at the Department of Mathematics at Brandeis University working with Carolyn Abbott. I am mainly interested in geometric group theory and low dimensional topology, but also have a soft spot for mathematical logic. My current research lies in geometric group theory, more specifically, mapping class groups of graphs, and graph end spaces.

Rocky is short for Rachmiel  (pronounced [ˈɹɑχ-mi-ˌɛɫ]), and I use he/him pronouns.

My non-mathematical interests include making music, spirituality, going on adventures, learning about different cultures, and so much more.

Email: (last name)(at)brandeis.edu

Office: Goldsmith 115

Research

• Dense Conjugacy Classes and Stability of Locally Finite Graphs. Preprint (2025). arXiv:2512.12033. [pdf]