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April 2026

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Wednesday, April 1st, 2026
12:00pm – 1:00pm
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Logic Seminar

Online Event
Gδ​ Circle Squaring
Spencer Unger, Assistant Professor, Department of Mathematics, University of Toronto,
Thursday, April 2nd, 2026
2:30pm – 3:30pm
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Caltech/USC Joint Algebra & Geometry Seminar (1/2)

Linde Hall 187
TBD
Mee Song Im, Assistant Professor, Department of Mathematics, Johns Hopkins University,
4:00pm – 5:00pm
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Caltech/USC Joint Algebra & Geometry Seminar (2/2)

Linde Hall 187
Gluing in Heegaard-Floer theory
Peng Zhou, Postdoc, Department of Mathematics, UC Berkeley,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
Sums along binary quartic forms
Mayank Pandey, PhD Candidate, Department of Mathematics, Princeton University,
Friday, April 3rd, 2026
12:00pm – 1:00pm
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Center for Social Information Sciences (CSIS) Seminar

Baxter 127
Finite Time Bounds for Robust Reinforcement Learning with Linear Function Approximation
Yashaswini Murthy, Postdoctoral Scholar Research Associate in Computing & Mathematical Sciences, Caltech,
2:00pm – 3:00pm
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Geometry and Topology Seminar (1/2)

Linde Hall 310
Flexibility and degeneracy around a theorem of Thurston
Alex Nolte, Postdoc, Department of Mathematics, IHES,
3:00pm – 4:00pm
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Geometry and Topology Seminar 2/2

Linde Hall 310
Classification of ancient cylindrical mean curvature flows and the Mean Convex Neighborhood Conjecture
Yi Lai, Assistant Professor, Department of Mathematics, UCI,
Monday, April 6th, 2026
4:00pm – 5:00pm
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H.B. Keller Colloquium

Annenberg 105
Toward a Science of Auditing AI-Mediated Information Ecosystems
Chara Podimata, Class of 1942 Career Development Assistant Professor and Assistant Professor of Operations Research and Statistics, MIT,
Tuesday, April 7th, 2026
12:00pm – 1:00pm
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CMX Lunch Seminar

Annenberg 213
Convergence Analysis of Deep Galerkin Methods for solving PDEs and Adjoint-optimized Neural-Network PDE Models
Justin Sirignano, Professor, Department of Mathematics, University of Oxford,
Thursday, April 9th, 2026
4:00pm – 7:00pm
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LA Probability Forum

Linde Hall 310
Ron Peled, Professor, Department of Mathematics, University of Maryland,
Shalin Parekh, Assistant Professor, Department of Mathematics, University of Maine,
Rahul Rajkumar, PhD Candidate, Department of Mathematics, UC Riverside,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
Higher theta series for reductive dual pairs and anomaly
Avi Zeff, Postdoc, Department of Mathematics, UC Berkeley,
Friday, April 10th, 2026
12:00pm – 1:00pm
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Center for Social Information Sciences (CSIS) Seminar

Baxter 127
Convergent Equilibrium Learning through Risk-aversion
Yizhou Zhang, Graduate Student, Department of Computing and Mathematical Sciences, Caltech,
Monday, April 13th, 2026
4:00pm – 5:00pm
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H.B. Keller Colloquium

Annenberg 105
Optimization by Decoded Quantum Interferometry
Stephen Jordan, Research Scientist, Google Quantum AI,
Tuesday, April 14th, 2026
12:00pm – 1:00pm
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CMX Lunch Seminar

Annenberg 213
Non-Hermitian skin effect in resonator systems
Silvio Barandun, Postdoctoral Scholar Research Associate, Department of Mathematics, Massachusetts Institute of Technology,
3:00pm – 4:00pm
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Mathematics & Machine Learning Seminar

East Bridge 114
Toward Structural Guarantees in AI: Quantum Tensor Networks for Sensitivity, Uncertainty, and Reliable Inference
Pragatheeswaran Vipulanandan, PhD Candidate, Department of Electrical and Computer Engineering, University of Miami,
4:00pm – 5:00pm
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Mathematics Colloquium

Linde Hall 310
The Eisenstein Ideal
Mladen Dimitrov, Professor, Department of Mathematics, University of Lille,
Wednesday, April 15th, 2026
12:00pm – 1:00pm
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Logic Seminar

Online Event
Local Problems on Grids: FIID/FFIID Separations and a Failure of Baire Shift Universality
Katalin Berlow, PhD candidate, Department of Mathematics, UC Berkeley,
Thursday, April 16th, 2026
2:30pm – 3:30pm
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Caltech/USC Joint Algebra and Geometry Seminar (1/2)

Linde Hall 187
Frobenius structures on quantum connections on Calabi--Yau 3-folds
Jae Hee Lee, Assistant Professor, Department of Mathematics, Stanford,
4:00pm – 5:00pm
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Caltech/USC Joint Algebra and Geometry Seminar (2/2)

Linde Hall 187
Holomorphic Lagrangians in Higgs and de Rham Moduli Spaces
Shengjing Xu, Graduate Student, Department of Mathematics, University of Pennsylvania,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
On the Completions of General Period Mappings
Haohua Deng, John Wesley Young Research Instructor, Department of Mathematics, Dartmouth College,
Friday, April 17th, 2026
2:00pm – 3:00pm
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Geometry and Topology Seminar (1/2)

Linde Hall 310
TBD
Eduardo Reyes, Assistant Professor, Department of Mathematics, Pontifical Caltholic University of Chile,
3:00pm – 4:00pm
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Geometry and Topology Seminar (2/2)

Linde Hall 310
Systoles of hyperbolic hybrids
Sami Douba, Postdoc, Department of Mathematics, University of Bonn,
Monday, April 20th, 2026
4:00pm – 5:00pm
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Caltech/USC Joint Algebra and Geometry Seminar (1/2)

Linde Hall 310
Two unexpected theorems about 5
Paul Melvin, Professor, Department of Mathematics, Bryn Mawr College,
4:00pm – 5:00pm
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H.B. Keller Colloquium

Annenberg 105
Adventures in Building Structure into Models: Lessons from Constructing Euclidean Neural Networks for Physics
Tess Smidt, Associate Professor, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology,
5:00pm – 6:00pm
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Caltech/USC Joint Algebra and Geometry Seminar (2/2)

Linde Hall 310
Slice disks modulo local knotting
Jeffrey Meier, Professor, Department of Mathematics, Western Washington University,
Tuesday, April 21st, 2026
12:00pm – 1:00pm
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Math Graduate Student Seminar

Linde Hall 255
Global Regularity for a Viscous Dyadic Model of the Navier-Stokes Equations
Sam Looi, Postdoc, Department of Mathematics, Caltech (California Institute of Technology),
Wednesday, April 22nd, 2026
12:00pm – 1:00pm
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Logic Seminar

Online Event
A dynamical proof of Matui's absorption theorem
Julien Melleray, Professor, Department of Mathematics, Université Lyon 1,
3:00pm – 4:00pm
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Fluids and Analysis Seminar

Online Event
On the Stabilizing Effect of Fluid Expansion for Relativistic Gaseous Body
Zhongtian "Kevin" Hu, Postdoc, Department of Mathematics, Princeton University,
Thursday, April 23rd, 2026
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
Shifted convolution problem for Siegel modular form
Wing Hong Leung, Assistant Professor, Department of Mathematics, Rutgers University,
Monday, April 27th, 2026
4:00pm – 5:00pm
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H.B. Keller Colloquium

Annenberg 105
Mathematics of Cryo-Electron Microscopy
Amit Singer, Professor, Department of Mathematics, Princeton University,
,
Tuesday, April 28th, 2026
12:00pm – 1:00pm
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Math Graduate Student Seminar

Linde Hall 255
A Hopf algebra on nonplanar binary forests
Elizabeth xiao, Graduate Student, Department of Mathematics, Caltech (California Institute of Technology),
Wednesday, April 29th, 2026
12:00pm – 1:00pm
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Logic Seminar

Online Event
The Borel dichromatic number
Tonatiuh Matos Wiederhold, PhD Candidate, Department of Mathematics, University of Toronto,
Thursday, April 30th, 2026
2:30pm – 3:30pm
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Caltech/USC Joint Algebra and Geometry Seminar (1/2)

Linde Hall 187
TBD
Dan Kaplan, Assistant Professor, Department of Mathematics, Long Beach State,
4:00pm – 5:00pm
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Caltech/USC Joint Algebra and Geometry Seminar (2/2)

Linde Hall 187
Tensor-generation on toric varieties
Daigo Ito, PhD Candidate, Department of Mathematics, UC Berkeley,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
A new proof of the Arithmetic Siegel--Weil formula
Yu Luo, PhD Candidate, Department of Mathematics, University of Wisconsin-Madison,