Events

ULTRAMATH 2022: Registration and Call for papers Ultrafilters and Ultraproducts Across Mathematics, and Related Topics June 6 - June 11, 2022, Pisa, Italy https://www.ultramath.it/ Dear all, We are happy to announce that the registration and the call for papers for the upcoming event "ULTRAMATH 2022 - Ultrafilters and Ultraproducts Across Mathematics, and Related Topics", that will be held in Pisa (Italy) from June 6th to June 11th, 2022, are now open. REGISTRATION: The deadline for registrations is ***MONDAY, MAY 9***. There is no registration fee, but completing the registration form is mandatory. Details for the registration and for grant applications can be found on the conference website. SUBMISSION OF AN ABSTRACT: The deadline for the submission of an abstract is ***MONDAY, MARCH 21***. Details on the procedure can be found on the conference website. The International Conference "ULTRAMATH 2022” aims to present recent results in the whole spectrum of mathematics which are grounded on the use of ultrafilters and ultraproducts. Its main goals: • Disseminate information about the various techniques related to the use of ultrafilters and ultraproducts, and their potential to attack open problems. • Bring together researchers with different backgrounds, and encourage their collaborations and interactions, especially on topics connecting different areas of mathematics. The covered topics of UltraMath 2022 include (but are not limited to): • Additive and Combinatorial Number Theory. • Combinatorics and Ramsey Theory. • Algebra and Geometry. • General Topology. • Measure Theory. • Ergodic Theory and Dynamics. • Functional Analysis and Metric Spaces. • Nonstandard Analysis and Model Theory. • Generalized Spaces and Differential Equations. • Set Theory. Greater prominence will be given to those results that satisfy (most of) the following conditions: • The results can be formulated and presented in non-specialist terms, and be in principle understandable by any practicing mathematician. • The usage of ultrafilters/ultraproducts is important (or even essential) in obtaining these results. • The results connect different areas of mathematics. • The results reveal new facets of known important topics. This is the second edition of “UltraMath”, after the one held in Pisa in 2008: http://people.dm.unipi.it/ultramath. After two years of postponement, we are strongly committed to holding this 2022 edition with the physical presence of lecturers and participants. We will make every effort to ensure that this is done safely; in the unfortunate case of a new emergency due to the pandemic, UltraMath 2022 will take place anyway as a hybrid or as an online event, depending on the situation. Scientific Committee: Vitaly Bergelson (Ohio State University, USA) Andreas Blass (University of Michigan, USA) Mauro Di Nasso (Università di Pisa, Italia) Renling Jin (College of Charleston, USA) Organizing Committee: Mauro Di Nasso (Università di Pisa, Italia) – chair Lorenzo Luperi Baglini (Università di Milano, Italia) LIST OF INVITED SPEAKERS Vieri Benci — Università di Pisa, Italia Vitaly Bergelson — Ohio State University, USA Andreas Blass — University of Michigan Ann Arbor, USA Artem Chernikov — University of California Los Angeles (UCLA), USA Natasha Dobrinen — University of Denver, USA Cornelia Druţu — University of Oxford, UK Isaac Goldbring — University of California Irvine (UCI), USA C. Ward Henson (TBC) — University of Illinois Urbana-Champaign, USA Neil Hindman (TBC) — Howard University, USA Michael Hrušák — Universidad Nacional Autónoma, México Renling Jin — College of Charleston, USA Steven Leth — University of Northern Colorado, USA Martino Lupini(TBC) — Victoria University, New Zealand Joel Moreira — University of Warwick, UK Jaroslav Nešetřil — Charles University Praha, Czech Republic Florian Richter – Northwestern University, USA David A. Ross — University of Hawaii, USA Sławomir Solecki — Cornell University, USA Dona Strauss — University of Hull, UK Stevo Todorcevic — Univ. of Toronto, Canada and Univ. Paris Diderot, France Luca Q. Zamboni (TBC) - Université de Lyon, France Those who need more information can contact the organizers at: ultramath2022@cs.dm.unipi.it. We hope to see you in Pisa! Best regards, The Organizers

The goals of this conference are to bring together internationally renowned researchers working on various topics related to stochastic analysis and, particularly, to the theory and applications of stochastic partial differential equations, and to expose and attract graduate students and young researchers to this steadily growing area.

The conference aims at addressing the following subjects: - Group actions in Pseudo-Riemannian geometry; - Algebraically special Pseudo-Riemannian manifolds; - Null congruences in Lorentzian geometry; - Invariants of metrics in GR and separation of spacetimes; - Cartan-theoretic methods for the equivalence problem; - Generalized gravity theories; - Black holes and horizons.

The goals of this conference are to bring together internationally renowned researchers working on various topics related to stochastic analysis and, particularly, to the theory and applications of stochastic partial differential equations, and to expose and attract graduate students and young researchers to this steadily growing area.

Karen Uhlenbeck will talk on Noether Theorems

Signal processing and machine learning constitutes an important area for the application of mathematical concepts and techniques, in an era where learning algorithms must be transparent, robust, explainable and understandable, and ethical. It is a thriving area, as demonstrated by the success of the UK hosting the recent International Conference on Acoustics, Speech, and Signal Processing (ICASSP) in Brighton in 2019. Signal and information processing is at the heart of our technological world, fuelled by developments in, for example, mobile communications, networks and graphs, multimedia systems, medical image analysis, genomics and bioengineering, neural signal processing, big data processing and internet of things. The aim of the conference is to bring together mathematicians, statisticians and engineers with a view to exploring recent developments in mathematics for signal processing and machine learning and identifying fruitful avenues for further research. It is hoped that the meeting will help to attract more mathematicians into this important and challenging field.

GAP (Geometry and Physics — Séminaire itinérant) is a series of conferences and summer schools held annually since 2003 in various countries around the world. The seventeenth edition of the annual GAP conference and summer school will be held at the Pacific Institute for the Mathematical Sciences (PIMS) on the campus of the University of British Columbia (UBC) in Vancouver, Canada from Monday May 16 to Friday May 20, 2022. The conference website and links to the previous editions are at https://sites.google.com/view/gap-xvii-vancouver/home?authuser=0 .

Some datasets are too small for standard statistical/data analysis to accurately characterize the data. Others are extremely large and data size reduction methods may be needed. One solution is to use topological data analysis to simplify and/or visualize data. This workshop will include both tutorials and research talks on topological techniques for visualizing data. In person workshop with hybrid component for those who wish to join virtually.

We are planning the following sections 1. Linear and nonlinear functional analysis 2. Function theory and approximation 3. Dynamical systems and their applications 4. Applications of analysis to real-world problems The official language of the Conference is English. The Registration Form is available on https://conference.pu.if.ua/cta/index.php. The deadline for registration is May 5, 2022. Each participant can offer a plenary or section talk or be a listener. All abstracts will be published online. Every participant will obtain a certificate. The abstract should be prepared in LaTeX. The deadline for submission of abstracts is May 5, 2022. Conference proceedings papers will be published in scientific journals Carpathian Mathematical Publications or Researches in Mathematics. If you have any additional questions, please feel free to contact us by email cta@pnu.edu.ua or visit our website at https://conference.pu.if.ua/cta.

The meeting features the Hirst Lecture 2022, given by the winner of the Joint LMS-BSHM Hirst Prize and Lectureship 2021, Professor Karine Chemla (CNRS). There will also be an accompanying talk by Professor Serafina Cuomo (Durham). The Hirst Prize and Lectureship for the History of Mathematics is awarded for contributions to the study of the history of mathematics. The prize will be awarded in recognition of original and innovative work in the history of mathematics, which may be in any medium. This prize is awarded jointly by the LMS and the British Society for the History of Mathematics. Programme (All times are in BST) 2.00 pm: Arrival 2.30 pm: Opening of the meeting. 2.45pm: Serafina Cuomo (Durham) 'Maths and the city. A snapshot of numeracy in classical Athens.' Abtract: I will explore the various spaces and practices for Athenian numeracy in the 5th and 4th century BCE, and discuss rates of numeracy, and also sketch a profile of who may have been numerate at the time. 3.45 pm: Tea 4.15 pm: Karine Chemla SPHERE (CNRS & Université de Paris) 'Algebraic work with operations in China, 1st century—13th century' Abstract: Thirteenth century Chinese mathematical works attest to two interesting innovations. Qin Jiushao’s Mathematical Work in Nine Chapters (Shushu Jiuzhang 數書九章, 1247) describes an algorithm solving congruence equations in ways related to the so-called “Chinese remainder theorem”. Moreover, Li Ye’ 李冶 Measuring the Circle on the Sea-Mirror (Ceyuan haijing, 1248) shows how to use polynomial algebra to establish algebraic equations solving mathematical problems. Both authors make use of the same technical expression: “one establishes one heavenly source/origin as… li tian yuan yi wei….” Historians of the past have relied on modern interpretations of the texts to draw the conclusion that, in the two contexts, this expression had different technical meanings. I suggest interpreting this expression in light of the ancient Chinese mathematical canon and its commentaries. This approach allows us to give the same meaning to the expression and, more importantly, to bring to light a tradition of formal work on operations to which a series of Chinese mathematical documents attests. 5.15 pm: Meeting closes - Wine reception. 6.30 pm: Society Dinner