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Current Seminars

  1. DDC - Computability Theory: Indestructibility on sets of positive upper density

    Location: MSRI: Online/Virtual
    Speakers: Rehana Patel (African Institute for Mathematical Sciences (AIMS))

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Abstract:

    A structure M is said to be indestructible on a subset of its underlying set if the substructure induced on this subset contains a copy of M.  Recently, W. Brian has shown that almost every Rado graph with underlying set the natural numbers is indestructible on any subset of positive upper density.  In this talk I will consider indestructibility, on all subsets of positive upper density, for arbitrary ultrahomogeneous relational structures on the naturals that are Martin-Löf random for some invariant measure.  This is preliminary work, joint with N. Ackerman and C. Freer.

    Updated on Oct 15, 2020 12:42 PM PDT
  2. Tea for DDC Members and Participants

    Location: MSRI: Online/Virtual

    Tea for members and participants of the Decidability, definability and computability in number theory virtual program.

    To participate, please register here: https://www.msri.org/seminars/25206

    Updated on Oct 15, 2020 08:39 PM PDT
  3. RAS - Mini Course: Invariant Random Subgroups and Lattices

    Location: MSRI: Online/Virtual
    Speakers: Tsachik Gelander (Weizmann Institute of Science)

    To attend this seminar, please register here: https://www.msri.org/seminars/25205

    Abstract:

    Invariant random subgroups (IRS) are conjugacy invariant probability measures on the space of subgroups in a given group G. They can be regarded both as a generalization of normal subgroups as well as a generalization of lattices. As such, it is intriguing to extend results from the theories of normal subgroups and of lattices to the context of IRS. Another approach is to analyse and then use the space IRS(G) as a compact G-space in order to establish new results about lattices. In this lecture series we shall try to give a taste of both approaches.

    Updated on Oct 13, 2020 11:51 AM PDT
  4. Fellowship of the Ring, National Seminar: A characteristic-free definition of holonomic D-modules

    Location: MSRI: Online/Virtual
    Speakers: Gennady Lyubeznik (University of Minnesota Twin Cities)

    To attend this seminar, you must register in advance, by clicking HERE.

    Abstract:

    Most of the theory of D-modules has been developed only in characteristic zero. This includes holonomic modules. Some candidates for holonomic modules in characteristic p>0 have been proposed using definitions specific to characteristic p>0. The first characteristic-free definition of holonomicity was given in 2010 by the speaker, but only for modules over polynomial rings. In the talk I am going to describe an extension of this definition to arbitrary non-singular varieties.

    Updated on Oct 15, 2020 08:52 PM PDT

Upcoming Seminars

  1. DDC Online Seminar: Special structures and unlikely intersections

    Location: MSRI: Online/Virtual
    Speakers: Andrei Yafaev

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Abstract:

    We introduce an axiomatic setting where conjectures about “unlikely intersections” make sense, in the spirit of Zilber's trichotomy.  We will review several typical examples where such situations occur - tori, abelian varieties, Shimura varieties, more generally mixed Shimura varieties. In the talk the following week, Laura Capuano will treat in detail the case of abelian schemes and the relative Manin-Mumford problem.

    Updated on Oct 14, 2020 08:51 AM PDT
  2. Tea for DDC Members and Participants

    Location: MSRI: Online/Virtual

    Tea for members and participants of the Decidability, definability and computability in number theory virtual program.

    To participate, please register here: https://www.msri.org/seminars/25206

    Updated on Oct 15, 2020 10:34 AM PDT
  3. DDC - Model Theory Seminar: Sets, groups, and fields definable in vector spaces with a bilinear form

    Location: MSRI: Online/Virtual
    Speakers: Jan Dobrowolski (University of Wrocław)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Abstract:

    There is a long history of study of algebraic objects definable in classical mathematical structures.

    As a prominent example, by results of Weil, Hrushovski, and van den Dries, it is known that the groups definable in an algebraically closed field K are precisely the algebraic groups over K, and the only infinite field definable in K is the field K itself. 

    The talk will be a report on my recent work on dimension, definable groups, and definable fields in vector spaces over algebraically closed [real closed] fields equipped with a non-degenerate alternating bilinear form or a non-degenerate [positive-definite] symmetric bilinear form. The main result states that every definable group is (algebraic-by-abelian) by-algebraic [(semialgebraic-by-abelian)-by-semialgebraic], which, in particular, answers a question of Granger. It follows that every definable field is definable in the field of scalars, hence either finite or definably isomorphic to it [finite or algebraically closed or real closed].

    If time permits, I will very briefly discuss some model theoretic phenomena in the considered structures.

    Updated on Oct 22, 2020 10:10 AM PDT
  4. RAS - Research Seminar (Part 2)

    Location: MSRI: Online/Virtual

    To participate in this seminar, please register here: https://www.msri.org/seminars/25205

    This is one of the research seminars for the RAS program, that distinguishes itself from the postdocs and program associates seminars in that speakers are chosen among Research Members, Research Professors with occasional outside speakers.

    Updated on Sep 10, 2020 10:19 AM PDT
  5. DDC - Introductory Seminar: Hilbert's Tenth Problem and Mazur's conjectures in large subrings of number fields

    Location: MSRI: Online/Virtual
    Speakers: Kirsten Eisentraeger (Pennsylvania State University)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Abstract:

    Hilbert's Tenth Problem in its original form was to find an algorithm to decide, given a multivariate polynomial equation with integer coefficients, whether it has a solution over the integers. In 1970 Matijasevich, building on work by Davis, Putnam and Robinson, proved that no such algorithm exists, i.e. Hilbert's Tenth Problem is undecidable. In this talk we will consider generalizations of Hilbert's Tenth Problem and Mazur's conjectures for large subrings of number fields. We will show that Hilbert's Tenth Problem is undecidable for large complementary subrings of number fields and that the analogues of Mazur's conjectures do not hold in these rings. This is joint work with Graham Everest and Alexandra Shlapentokh.

    Updated on Oct 21, 2020 03:03 PM PDT
  6. RAS - PA Seminar

    Location: MSRI: Online/Virtual

    The PA seminar is a learning seminar for early career mathematicians (graduate student and postdocs).  Please only join the seminar if you are an early career mathematician.

    To participate, please email Tommaso Cremaschi or James Farre.

    Updated on Oct 06, 2020 08:52 AM PDT
  7. DDC - Minicourse: Picard-Fuchs Differential Equations - Introduction: Periods and Picard-Fuchs equations

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 01:05 PM PDT
  8. DDC - Valuation Theory

    Location: MSRI: Online/Virtual

    Valuation theory plays a major part in the interaction between number theory and logic. In this seminar, a variety of topics from valuation theory, and in particular connections to model theory, will be discussed. There will be a strong emphasis on results involving the definability of valuations.

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Updated on Aug 31, 2020 09:34 AM PDT
  9. DDC - Minicourse: Picard-Fuchs Differential Equations - Discussion Section 1

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 12:58 PM PDT
  10. Fellowship of the Ring, National Seminar:

    Location: MSRI: Online/Virtual

    To attend this seminar, you must register in advance, by clicking HERE.

    Updated on Sep 03, 2020 11:07 AM PDT
  11. RAS - Research Seminar (Part 2)

    Location: MSRI: Online/Virtual

    To participate in this seminar, please register here: https://www.msri.org/seminars/25205

    This is one of the research seminars for the RAS program, that distinguishes itself from the postdocs and program associates seminars in that speakers are chosen among Research Members, Research Professors with occasional outside speakers.

    Updated on Sep 10, 2020 10:19 AM PDT
  12. RAS - PA Seminar

    Location: MSRI: Online/Virtual

    The PA seminar is a learning seminar for early career mathematicians (graduate student and postdocs).  Please only join the seminar if you are an early career mathematician.

    To participate, please email Tommaso Cremaschi or James Farre.

    Updated on Oct 06, 2020 08:52 AM PDT
  13. DDC - Minicourse: Picard-Fuchs Differential Equations - The Griffiths-Dwork algorithm and its variants

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 01:05 PM PDT
  14. DDC - Valuation Theory

    Location: MSRI: Online/Virtual

    Valuation theory plays a major part in the interaction between number theory and logic. In this seminar, a variety of topics from valuation theory, and in particular connections to model theory, will be discussed. There will be a strong emphasis on results involving the definability of valuations.

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

     

    Updated on Aug 31, 2020 09:34 AM PDT
  15. DDC - Minicourse: Picard-Fuchs Differential Equations - Discussion Section 2

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 12:58 PM PDT
  16. Fellowship of the Ring, National Seminar:

    Location: MSRI: Online/Virtual

    To attend this seminar, you must register in advance, by clicking HERE.

    Updated on Sep 03, 2020 11:07 AM PDT
  17. DDC - Online Seminar: Recovering algebraic curves from L-functions

    Location: MSRI: Online/Virtual
    Speakers: Jose Felipe Voloch (University of Canterbury)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Abstract:

    We discuss how to recover an algebraic curve over a finite field from L-functions associated with it. We look at the problem from a number of different angles, including the input coming from model theory, and pose some open questions. Joint work with J. Booher.

    Updated on Oct 15, 2020 07:50 PM PDT
  18. RAS - Research Seminar (Part 2)

    Location: MSRI: Online/Virtual

    To participate in this seminar, please register here: https://www.msri.org/seminars/25205

    This is one of the research seminars for the RAS program, that distinguishes itself from the postdocs and program associates seminars in that speakers are chosen among Research Members, Research Professors with occasional outside speakers.

    Updated on Sep 10, 2020 10:19 AM PDT
  19. RAS - PA Seminar

    Location: MSRI: Online/Virtual

    The PA seminar is a learning seminar for early career mathematicians (graduate student and postdocs).  Please only join the seminar if you are an early career mathematician.

    To participate, please email Tommaso Cremaschi or James Farre.

    Updated on Oct 06, 2020 08:52 AM PDT
  20. DDC - Minicourse: Picard-Fuchs Differential Equations - From combinatorics to Picard-Fuchs equations

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 01:08 PM PDT
  21. DDC - Valuation Theory

    Location: MSRI: Online/Virtual

    Valuation theory plays a major part in the interaction between number theory and logic. In this seminar, a variety of topics from valuation theory, and in particular connections to model theory, will be discussed. There will be a strong emphasis on results involving the definability of valuations.

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Updated on Aug 31, 2020 09:35 AM PDT
  22. DDC - Minicourse: Picard-Fuchs Differential Equations - Discussion Section 3

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 12:58 PM PDT
  23. Fellowship of the Ring, National Seminar:

    Location: MSRI: Online/Virtual

    To attend this seminar, you must register in advance, by clicking HERE.

    Updated on Sep 03, 2020 11:07 AM PDT
  24. RAS - Research Seminar (Part 2)

    Location: MSRI: Online/Virtual

    To participate in this seminar, please register here: https://www.msri.org/seminars/25205

    This is one of the research seminars for the RAS program, that distinguishes itself from the postdocs and program associates seminars in that speakers are chosen among Research Members, Research Professors with occasional outside speakers.

    Updated on Sep 10, 2020 10:19 AM PDT
  25. RAS - PA Seminar

    Location: MSRI: Online/Virtual

    The PA seminar is a learning seminar for early career mathematicians (graduate student and postdocs).  Please only join the seminar if you are an early career mathematician.

    To participate, please email Tommaso Cremaschi or James Farre.

    Updated on Oct 06, 2020 08:52 AM PDT
  26. DDC - Minicourse: Picard-Fuchs Differential Equations - Differential algebra and jump loci in moduli

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 01:10 PM PDT
  27. DDC - Valuation Theory

    Location: MSRI: Online/Virtual

    Valuation theory plays a major part in the interaction between number theory and logic. In this seminar, a variety of topics from valuation theory, and in particular connections to model theory, will be discussed. There will be a strong emphasis on results involving the definability of valuations.

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Updated on Aug 31, 2020 09:35 AM PDT
  28. DDC - Minicourse: Picard-Fuchs Differential Equations - Discussion Section 4

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 12:59 PM PDT
  29. Fellowship of the Ring, National Seminar:

    Location: MSRI: Online/Virtual

    To attend this seminar, you must register in advance, by clicking HERE.

    Updated on Sep 03, 2020 11:07 AM PDT
  30. RAS - Research Seminar (Part 2)

    Location: MSRI: Online/Virtual

    To participate in this seminar, please register here: https://www.msri.org/seminars/25205

    This is one of the research seminars for the RAS program, that distinguishes itself from the postdocs and program associates seminars in that speakers are chosen among Research Members, Research Professors with occasional outside speakers.

    Updated on Sep 10, 2020 10:19 AM PDT
  31. RAS - PA Seminar

    Location: MSRI: Online/Virtual

    The PA seminar is a learning seminar for early career mathematicians (graduate student and postdocs).  Please only join the seminar if you are an early career mathematician.

    To participate, please email Tommaso Cremaschi or James Farre.

    Updated on Oct 06, 2020 08:53 AM PDT
  32. DDC - Valuation Theory

    Location: MSRI: Online/Virtual

    Valuation theory plays a major part in the interaction between number theory and logic. In this seminar, a variety of topics from valuation theory, and in particular connections to model theory, will be discussed. There will be a strong emphasis on results involving the definability of valuations.

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Updated on Aug 31, 2020 09:35 AM PDT
  33. RAS - Research Seminar (Part 2)

    Location: MSRI: Online/Virtual

    To participate in this seminar, please register here: https://www.msri.org/seminars/25205

    This is one of the research seminars for the RAS program, that distinguishes itself from the postdocs and program associates seminars in that speakers are chosen among Research Members, Research Professors with occasional outside speakers.

    Updated on Sep 10, 2020 10:19 AM PDT
  34. RAS - PA Seminar

    Location: MSRI: Online/Virtual

    The PA seminar is a learning seminar for early career mathematicians (graduate student and postdocs).  Please only join the seminar if you are an early career mathematician.

    To participate, please email Tommaso Cremaschi or James Farre.

    Updated on Oct 06, 2020 08:53 AM PDT
  35. DDC - Minicourse: Picard-Fuchs Differential Equations - Fibrations and parabolic cohomology

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 01:10 PM PDT
  36. DDC - Valuation Theory

    Location: MSRI: Online/Virtual

    Valuation theory plays a major part in the interaction between number theory and logic. In this seminar, a variety of topics from valuation theory, and in particular connections to model theory, will be discussed. There will be a strong emphasis on results involving the definability of valuations.

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Updated on Aug 31, 2020 09:35 AM PDT
  37. DDC - Minicourse: Picard-Fuchs Differential Equations - Discussion Section 5

    Location: MSRI: Online/Virtual
    Speakers: Charles Doran (University of Alberta)

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    This mini course is an introduction to the theory, computation, and applications of Picard-Fuchs differential equations.  The main prerequisite is knowledge of basic complex algebraic geometry at the introductory graduate level.  We will develop a thorough understanding, from several different theoretical perspectives, of some of the key examples in the mathematics and physics literature.  This course should be of interest to geometers, model theorists, and physicists alike.

    Updated on Oct 05, 2020 01:03 PM PDT
  38. Fellowship of the Ring, National Seminar:

    Location: MSRI: Online/Virtual

    To attend this seminar, you must register in advance, by clicking HERE.

    Updated on Sep 03, 2020 11:07 AM PDT
  39. RAS - Research Seminar (Part 2)

    Location: MSRI: Online/Virtual

    To participate in this seminar, please register here: https://www.msri.org/seminars/25205

    This is one of the research seminars for the RAS program, that distinguishes itself from the postdocs and program associates seminars in that speakers are chosen among Research Members, Research Professors with occasional outside speakers.

    Updated on Sep 10, 2020 10:19 AM PDT
  40. RAS - PA Seminar

    Location: MSRI: Online/Virtual

    The PA seminar is a learning seminar for early career mathematicians (graduate student and postdocs).  Please only join the seminar if you are an early career mathematician.

    To participate, please email Tommaso Cremaschi or James Farre.

    Updated on Oct 06, 2020 08:53 AM PDT
  41. DDC - Valuation Theory

    Location: MSRI: Online/Virtual

    Valuation theory plays a major part in the interaction between number theory and logic. In this seminar, a variety of topics from valuation theory, and in particular connections to model theory, will be discussed. There will be a strong emphasis on results involving the definability of valuations.

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Updated on Aug 31, 2020 09:36 AM PDT
  42. RAS - Research Seminar (Part 2)

    Location: MSRI: Online/Virtual

    To participate in this seminar, please register here: https://www.msri.org/seminars/25205

    This is one of the research seminars for the RAS program, that distinguishes itself from the postdocs and program associates seminars in that speakers are chosen among Research Members, Research Professors with occasional outside speakers.

    Updated on Sep 18, 2020 03:45 PM PDT
  43. RAS - PA Seminar

    Location: MSRI: Online/Virtual

    The PA seminar is a learning seminar for early career mathematicians (graduate student and postdocs).  Please only join the seminar if you are an early career mathematician.

    To participate, please email Tommaso Cremaschi or James Farre.

    Updated on Oct 06, 2020 08:53 AM PDT
  44. DDC - Valuation Theory

    Location: MSRI: Online/Virtual

    Valuation theory plays a major part in the interaction between number theory and logic. In this seminar, a variety of topics from valuation theory, and in particular connections to model theory, will be discussed. There will be a strong emphasis on results involving the definability of valuations.

    To participate in this seminar, please register here: https://www.msri.org/seminars/25206

    Updated on Aug 31, 2020 09:36 AM PDT
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Past Seminars

  1. Seminar DDC - Social Event

    Updated on Oct 09, 2020 03:43 PM PDT
  2. Seminar RAS - Social Event

    Updated on Oct 09, 2020 01:42 PM PDT
There are more then 30 past seminars. Please go to Past seminars to see all past seminars.