Jun 25, 2026 · May 15, 2025 Graphical models for topological groups: A case study on countable Stone spaces with Beth Branman, …

I am a polymath based in Brooklyn, New York. I like math, music, writing, design, code… 今も日本語を勉強してる。

The Mathematics Colloquium in the department of Mathematics and Computer Science at Rutgers-Newark takes place in 204 Smith …

Where to Put my Little Yops? November 12, 2025 Reinit / How to Draw a Triangle in Three Years

Hi! My name is Robbie Lyman. Now (November 2025) Currently I am working on long-overdue revisions to a research paper, …

The treatment is brisk. To the interested reader, I would highly recommend Emily Riehl’s Category Theory in Context, which is the …

Spaces of constant curvature In this post, I want to kind of bring together the theme of curvature and the theme of affine or projective …

Ostensibly, the aim of a field like geometric group theory, low-dimensional topology or analysis, is concerned with answering …

Thus this topology makes G a topological group. ∎ Groups acting on graphs Let G be a group acting on a connected, simplicial …

Towards developing the tools of geometric group theory for non-locally compact topological groups, we give one of the first complete …

Reinit Hi again. This is Robbie. For most of a decade, I used to go by Rylee. I do math, I make music, I write code, I’m learning …