Shay Ben-Moshe

shaybm9@gmail.com

Publications & Preprints Organization Guides and Advice Notes

I am a fellow of the Max Planck–Weizmann joint postdoctoral program, currently at the Max Planck Institute for Mathematics in Bonn, and previously at the Weizmann Institute of Science. I completed my PhD at the Hebrew University under the supervision of Tomer Schlank and Lior Yanovski. For more information, see my CV.

My research so far has centered around homotopy theory, particularly chromatic homotopy theory, algebraic K-theory, higher categories, and their interplay. I am also interested in other fields of mathematics, most recently arithmetic geometry and its applications to homotopy theory and vice versa.

Beyond math, I am interested in various other subjects, including physics, philosophy, computer science and statistics. I also have an extensive background in software engineering and in cyber-security research, as detailed on my LinkedIn profile.

In my free time I enjoy hiking long-distance trails and doing capoeira.

My first name is pronounced like “shy”, and my last name like “ben” + “mo-sheh”.

Publications & Preprints

Mathematics

The Redshift Bound from Quillen–Lichtenbaum, preprint, 2026.

Chromatic Higher Semiadditivity by Height Induction, preprint, 2025.

Categorical Ambidexterity, New York Journal of Mathematics, 2026.

Higher Semiadditivity in Transchromatic Homotopy Theory, preprint, 2024.

Uniqueness and (∞,2)-naturality of Yoneda, Documenta Mathematica, 2025.

Chromatic Cardinalities via Redshift with Shachar Carmeli, Tomer Schlank & Lior Yanovski, International Mathematics Research Notices, 2023.

Descent and cyclotomic redshift for chromatically localized algebraic K-theory with Shachar Carmeli, Tomer Schlank & Lior Yanovski, Journal of the American Mathematical Society, 2025.

Naturality of the ∞-categorical enriched Yoneda embedding, Journal of Pure and Applied Algebra, 2024.

Higher semiadditive algebraic K-theory and redshift with Tomer Schlank, Compositio Mathematica, 2024.

Physics

Unusual Interactions of Pre-and-Post-Selected Particles with Yakir Aharonov and Eliahu Cohen, EPJ Web of Conferences, 2014.

Statistics & Epidemiology

SARS-CoV-2 spike IgG titres up to 137 days following Comirnaty mRNA COVID-19 vaccination, Israel, February to May 2021 with Tal Patalon et al., Eurosurveillance, 2022.

Evaluating red blood cell distribution width from community blood tests as a predictor of hospitalization and mortality in adults with SARS-CoV-2: a cohort study with Tamar Banon et al., Annals of Medicine, 2021.

Survey of Behaviour Attitudes Towards Preventive Measures Following COVID-19 Vaccination with Daniella Rahamim-Cohen et al., preprint, 2021.

A 1 to 1000 SARS-CoV-2 reinfection proportion in members of a large healthcare provider in Israel: a preliminary report with Galit Perez et al., preprint, 2021.

Organization

Guides and Advice

Notes

Miscellaneous notes

  1. A note on Mitchell's theorem
    A one-page proof of Mitchell's theorem following Elmanto–Nardin–Yang.

Research talks

  1. Descent and redshift in algebraic K-theory, University of Hamburg, Quantum Topology and Categorification Seminar, 03/06/2026
  2. Categorical Ambidexterity, MPIM Bonn, Abstract Homotopy Theory Seminar, 12/05/2026
  3. Redshift, blueshift, and traces, Topology Intercity Seminar, Utrecht, 27/03/2026
  4. Transfers in transchromatic homotopy theory, Bonn Topology Seminar, 28/10/2025
  5. Transfers in transchromatic homotopy theory, University of Toronto Algebraic Geometry Seminar, 22/10/2025
  6. Descent and Redshift in Algebraic K-Theory (video recording), Ben Gurion University Algebraic Geometry & Number Theory Seminar, 29/01/2025
  7. Higher Semiadditivity in Transchromatic Homotopy Theory, University of Haifa Topology & Geometry Seminar, 01/01/2025
  8. Higher Semiadditive Algebraic K-Theory and Redshift, MIT Topology Seminar, 13/03/2023
  9. Higher Semiadditive Algebraic K-Theory and Redshift, Jerusalem-Münster Homotopy Fridays, 06/05/2022
  10. Higher Semiadditive Algebraic K-Theory and Redshift, University of Pennsylvania Homotopy Theory Seminar, 04/02/2022

Expository talks

  1. Constructing and (Not) Computing Algebraic K-Theory, Unterseminar, MPIM, 26/01/2026
    An introductory talk on algebraic K-theory for postdocs from all fields.
  2. Duality for Lie groups and J-Homomorphisms, Six Functor Formalisms Seminar, MPIM, 22/01/2026
    Covering Sections 10 and 11 from Dustin Clausen's Duality and linearization for p-adic lie groups.
  3. A Model for Bott Periodicity, Rotation Invariance Seminar, 12/06/2025
    Notes on Section 6 of Lurie's Rotation Invariance in Algebraic K-Theory.
  4. Delta Power Operations, Talbot 2021: Ambidexterity in Chromatic Homotopy Theory, 26/10/2021
    Notes on the construction of the delta power operations, constructed by Carmeli-Schlank-Yanovski for their proof of the ∞-semiadditivity of the T(n)-local category.
  5. Integral Models for Spaces via the Higher Frobenius, Sea of Galilee Homotopy Workshop on Algebraic Models for Spaces, 14/09/2021
  6. Grothendieck-Lefschetz and the Weil Conjectures (except RH), Weil Conjectures Workshop, 19/09/2020
  7. Algebraic K-Theory of Finite Fields, K-Theory Seminar, 01/04/2020
    A modern perspective on the plus construction and Quillen's computation of the algebraic K-theory of finite fields.
  8. Tate Elliptic Curves and p-adic Uniformization, The HUJI-BGU Workshop in Arithmetic, 16/12/2019
  9. Prisms, Prismatic Cohomology Course, 08/12/2019
    Covering (parts of) chapter 3 of Bhatt and Scholze's paper.
  10. ∞-Categories and Spectra, Kan Seminar, 27/10/2019
    Introduction to ∞-categories, higher algebra and spectra.
  11. Topological Modular Forms and Homotopy groups of TMF, Seminar on computational results in chromatic homotopy, 11/09/2019
  12. Galois Descent, Picard Groups and the K(n)-local Category, Seminar on computational results in chromatic homotopy, 22/08/2019
  13. Chromatic Homotopy, Nilpotence, and the Thick Subcategory Theorem, Seminar on computational results in chromatic homotopy, 04/07/2019
  14. HKR Generalized Character Theory, Caesarea Workshop on Morava E-Theory, 17/06/2019
    Reviewing on Hopkins-Kuhn-Ravenel generalized character theory.
  15. Landweber Exact Functor Theorem, Caesarea Workshop Preparation Day, 03/06/2019
  16. HHR Strategy for Kervaire Invariant One, Seminar on Equivariant Homotopy, 30/05/2019
    Outlining the strategy of Hill-Hopkins-Ravenel's proof of the Kervaire invariant one problem.
  17. Lubin-Tate Deformation Theory, Seminar on Spectral Algebraic Geometry, 06/12/2018
  18. Neutral Tannakian Categories, Seminar on Nonabelian Chabauty Method, 25/11/2018
    Notes on neutral Tannakian categories and fundamental groups in algebraic geometry.
  19. A Stratified Homotopy Hypothesis, Caesarea Workshop on Factorization Homology, 18/06/2018
    Notes on exit-path ∞-categories, based on Ayala-Francis-Rozenblyum's paper A Stratified Homotopy Hypothesis.
  20. The Chromatic Picture, Seminar on Infinity Categorical Ambidexterity, 03/12/2017
  21. The Algebraic Properties of Formal Group Laws, Caesarea Workshop on The Nilpotence Conjecture, 20/06/2017
  22. The Existence of Morse Functions (Hebrew), Seminar on Morse Theory, 21/11/2016
  23. K-Theory and Bott Periodicity (Hebrew), Seminar on Algebraic Topology, 02/12/2015