Papers & Publications

Articles and Preprints - Mathematics

1. Cobordism and Concordance of Surfaces in 4-Manifolds (link)

Preprint. arXiv:2601.22152

2. The Metaplectic Representation is Faithful (link)

C. Chang, S. Hellsten, M. Marcos Losada, S. Novac 

Journal of Algebra, Volume 684 (2025)

Articles and Preprints - Linguistics & Other

3. LINGOLY-TOO: Disentangling Memorisation from Reasoning with Linguistic Templatisation and Orthographic Obfuscation (link)

J. Khouja, K. Korgul, S. Hellsten, L. Yang, V. Neacsu, H. Mayne, R. Kearns, A.M. Bean, A. Mahdi

Accepted. ICLR 2026.

4. LINGOLY: A Benchmark of Olympiad-Level Linguistic Reasoning Puzzles in Low-Resource and Extinct Languages (link)

A.M. Bean, S. Hellsten, H. Mayne, J. Magomere, E.A. Chi, R. Chi, S.A. Hale, H.R. Kirk

NeurIPS 2025; with Oral Presentation.

Master's Dissertation

5. Topological Obstructions to Positive Scalar Curvature (link)

Supervised by Jason Lotay

[Many errors and omissions surely remain in this dissertation -- please read with a generous but cautious eye.]