Otto Sumray

Bio

I am a final year DPhil student at Ludwig Cancer Research and the Centre for Topological Data Analysis at the University of Oxford. My interests are in applied topology, applied category theory, and topological signal processing with application to biological data, such as single cell RNA-seq and ATAC-seq.

Supervisors:

• Xin Lu, Ludwig Cancer Research
• Heather Harrington, Mathematical Institute
• Vidit Nanda, Mathematical Institute

Groups:

• Lu Lab
• Centre for Topological Data Analysis
• Algebraic Systems Biology

Previously I was an MMath in mathematics at the University of Oxford.

Thomas Chaplin and I created The Computational and Applied Topology List, a searchable and tagged repository of TDA software.

Publications & Preprints

• Quiver Laplacians and Feature Selection
  Otto Sumray, Heather A. Harrington, Vidit Nanda
  arXiv:2404.06993
  
• Multiscale methods for signal selection in single-cell data
  Renee S. Hoekzema*, Lewis Marsh*, Otto Sumray*, Thomas M. Carroll, Xin Lu, Helen M. Byrne, Heather A. Harrington
  (*shared first authors)
  Entropy 2022, 24, 1116 special issue Applications of Topological Data Analysis in the Life Sciences

• A blood atlas of COVID-19 defines hallmarks of disease severity and specificity
  COvid-19 Multi-omics Blood ATlas (COMBAT) Consortium
  Cell Volume 185, Issue 5, 3 March 2022, Pages 916-938.e58

Other Writing

• Discrete Morse Theory for Persistent Cosheaf Homology
  Mini-project for the Oxford part C course C3.9 Computational Algebraic Topology.
• Symplectic Geometry and Quantisation
  Masters disseration, supervised by Andrew Dancer.

Posters

• A Harmonic Approach to Feature Selection Presented at TDA week 2023, University of Kyoto and the Young Topologists Meeting 2023, EPFL.
• The Persistent Rayleigh Quotient for Feature Selection in Single Cell Transcriptomics
  Presented at the Young Topologists Meeting 2022, University of Copenhagen.
• The Persistent Rayleigh Quotient for Feature Selection in scRNA-Seq Data
  Presented at the Ludwig Retreat 2022, University of Oxford.

Teaching

2022/23

Computational Algebraic Topology (HT)

Class tutor

2021/22

Category Theory (MT)

Teaching assistant

Computational Algebraic Topology (HT)

Teaching assistant

Contact & Misc

Contact form

Otto Sumray

Email

otto.sumray@new.ox.ac.uk

GitHub

https://github.com/osumray

ORCID

0000-0003-1735-0595

PGP Public Key fingerprint

0E08 43C0 3D41 0615