Austyn Simpson
I am an NSF postdoctoral assistant professor in the Mathematics Department at the University of Michigan. My research interests are in commutative algebra and algebraic geometry with a focus on singularities in prime characteristic.
Papers
- Noncatenary splinters in prime characteristic (with S. Loepp), submitted.
arXiv
.
- Flat morphisms with regular fibers do not preserve F-rationality (with E. Quinlan-Gallego, A. K. Singh). Rev. Mat. Iberoam. 40 (2024) no. 5, 1989-2001.
RMI
, arXiv
.
- The perfection can be a noncoherent GCD domain. J. Commut. Algebra 16 (2024) no. 3, 363-367.
JCA
, arXiv
.
- On F-pure inversion of adjunction (with T. Polstra, K. Tucker), to appear in Higher Dimensional Algebraic Geometry: A Volume in Honor of V.V. Shokurov.
Book
,arXiv
.
- F-purity deforms in Q-Gorenstein rings (with T. Polstra). Int. Math Res. Not. IMRN (2023) no. 24, 20725–20747.
IMRN
, arXiv
.
- F-nilpotent rings and permanence properties (with J. Kenkel, K. Maddox, T. Polstra). J. Commut. Algebra 15 (2023) no. 4, 559-575.
JCA
, arXiv
.
- Hilbert-Kunz multiplicity of fibers and Bertini theorems (with R. Datta). J. Algebra 595 (2022), 479-522.
JofA
, arXiv
.
Papers with undergraduates
- ACC for F-signature: a likely counterexample (with C. Adams, T. Sandstrom), submitted.
arXiv
.
- Uniform arithmetic in local rings via ultraproducts (with C. Adams, F. Cantor, A. Gashi, S. Mujevic, S. Park, J. Zomback). Beitr. Algebra Geom. (2024).
BZAG
, arXiv
.
- On localization of tight closure in Line-S4 quartics (with L. Borevitz, N. Nader, T. Sandstrom, A. Shapiro, J. Zomback). J. Pure Appl. Algebra 228 (2024).
JPAA
, arXiv
.
email: austyn at umich dot edu