Linus Richter

I completed my PhD at Victoria University of Wellington advised by Dan Turetsky. My main research interests are in mathematical logic, particularly computability theory and set theory. I currently work on applications of algorithmic randomness to fractal geometry, reverse mathematics, and the theory of forcing.

From June onwards I will be a Research Fellow in the Department of Mathematics at the National University of Singapore.

Before coming to New Zealand, I received a Master's degree from the University of Manchester (UK) in 2018; my master's project was supervised by Gareth Jones.


Contact: linus.richter (at) sms.vuw.ac.nz
Me

Publications

Co-analytic Counterexamples to Marstrand's Projection Theorem

submitted // arXiv // PDF

More on Bases of Uncountable Free Abelian Groups

with Noam Greenberg, Saharon Shelah, and Dan Turetsky // to appear // PDF

On the Definability and Complexity of Sets and Structures

PhD thesis // PDF

Talks

The Borel-Definable Group Cohomology of ℝn Is (Hopefully) Simple

IMS Graduate Summer School in Logic, National University of Singapore // Jun 2023 // PDF

On CA-Recursion and Marstrand's Theorem

Victoria University of Wellington Logic Seminar

Part 1: Controlling the Construction of CA-sets // Mar 2023 // PDF

Part 2: CA Counterexamples to Marstrand's Projection Theorem // Mar 2023 // PDF

Co-analytic Counterexamples to Marstrand's Projection Theorem

Penn State Logic Seminar // online // Sep 2023 // PDF

National University of Singapore Logic Seminar // online // Mar 2023 // PDF

Computability Theory and Applications Seminar // online // Jan 2023 // PDF

On (Borel) Group Extensions

University of Sydney Graduate Talks in Topology and Geometry (GT)^2 // online // May 2022 // Slides PDF, Hand PDF

On Homological Algebra, Group Extensions, and Descriptive Set Theory

VUW SMS Grad Seminar // May 2021 // PDF

When the Search for Proofs Turns Futile

VUW SMS Grad Seminar // Nov 2020 // PDF

Higher Derived Limits and Cohomology of Ordinals

Victoria University of Wellington Logic Seminar // Apr 2020 // PDF

Computability, Complexity, and Some Algebra

NZMASP, Wainui // Nov 2019 // PDF

More on Bases of Uncountable Free Abelian Groups

Victoria University of Wellington Logic Seminar // Aug 2019

Miscellaneous

Doctoral Proposal

Victoria University of Wellington // March 2020 // PDF

Brief notes used for teaching

3 is a union of disjoint circles under AC // PDF

One Way to Think About: Zorn's Lemma // PDF

One Way to Think About: Change of Basis Matrices // PDF


last updated: 20/04/2024