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Current Seminars

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1. HC & QS - Configuration spaces and Diffeomorphisms: Fulton-MacPherson compactifications as models for E_n operads

Location: MSRI: Baker Board Room
Speakers: Luciana Basualdo Bonatto (University of Oxford)
Updated on Feb 20, 2020 02:57 PM PST
2. Joint HC & QS Colloquium: Algebraic K-theory and trace methods

Location: MSRI: Simons Auditorium
Speakers: Teena Gerhardt (Michigan State University)

Algebraic K-theory is an invariant of rings which illustrates a fascinating interplay between algebra and topology. Defined using topological tools, this invariant has important applications to algebraic geometry, number theory, and geometric topology. One fruitful approach to studying algebraic K-theory is via trace maps, relating algebraic K-theory to (topological) Hochschild homology, and (topological) cyclic homology. In this colloquium-style talk I will give an introduction to algebraic K-theory and its applications, and talk about modern methods to compute algebraic K-theory.

Updated on Feb 19, 2020 01:19 PM PST
3. (∞,2)-categories: Enriched ∞-categories

Location: MSRI: Simons Auditorium
Speakers: Rune Haugseng (Norwegian University of Science and Technology (NTNU))

In the first part of the talk I will begin by introducing several ∞-categorical algebraic structures arising from the simplex category, and then use these to give a definition of enriched ∞-categories. I will also discuss some basic results about these objects, and perhaps mention some alternative definitions. In the second part I will talk about bimodules between enriched ∞-categories and Hinich's work on the Yoneda lemma. I will end by briefly talking about framed double ∞-categories (AKA proarrow equipments), which should give a good setting for doing some more category theory with enriched ∞-categories (such as enriched (co)limits and Kan extensions).

Updated on Feb 20, 2020 11:39 AM PST
4. HC Seminar - Operadic Category Theory: TBA

Location: MSRI: Baker Board Room
Speakers: Muriel Livernet (Institut de Mathematiques de Jussieu)
Updated on Feb 21, 2020 09:08 AM PST
5. (∞,2)-categories: (Op)lax natural transformations of (∞,n)-categories

Location: MSRI: Simons Auditorium
Speakers: Claudia Scheimbauer (TU München)

I will explain a definition of (op)lax natural transformations for (∞,n)-categories using the model of (complete) n-fold Segal spaces. The main step in the construction is to define a family of strict n-categories (more precisely, computads), which should be thought of as what one would expect to be a Gray tensor product of the walking l-fold compositions of k-morphisms. I will explain some immediate consequences of our definitions and focus on (pictures of) low-dimensional cases. The motivation for this project was to define twisted field theories’’, related to relative field theories, as suggested in work by Stolz-Teichner and Freed-Teleman. If requested by the audience, I will explain briefly what I mean by this. This was joint work with Theo Johnson-Freyd.

Updated on Feb 20, 2020 11:46 AM PST
6. HC&QS - Joint Newcomers Seminar: Classification of Super-modular Categories & Real topological cyclic homology via the parametrized Tate construction

Location: MSRI: Simons Auditorium
Speakers: Jay Shah (University of Notre Dame), Qing Zhang (Zhongshan University)
Updated on Feb 20, 2020 02:55 PM PST
7. (∞,2)-categories: Polynomial functors and infinity operads

Location: MSRI: Simons Auditorium
Speakers: David Gepner (University of Melbourne)

We will discuss aspects of the theory of polynomials functors and infinity operads. Time permitting we will sketch some steps in an argument (joint with Haugseng and Kock) that the infinity categories of infinity operads and analytic monads are equivalent.

Updated on Feb 20, 2020 11:47 AM PST
8. HC & QS - Blob Homology: More about the blob complex

Location: MSRI: Baker Board Room
Speakers: Scott Morrison (Australian National University), Kevin Walker (Microsoft Research Station Q)

The seminar will continue explaining blob homology.

Updated on Feb 20, 2020 10:44 AM PST
9. QS - Seminar: K-theory for operator algebras, categorification and higher twists

Location: MSRI: Simons Auditorium
Speakers: David Evans (Cardiff University)

This talk is  part of a programme to understand conformal field theory through K-theory, in particular twisted equivariant K-theory.

I describe work with Andreas Aaserud on the actions of braided C*-tensor categories on operator algebras or realizing these categories as modules over an operator algebra. Freed Hopkins Teleman realized  the Verlinde ring of positive energy representations of loop groups through twisted equivariant K-theory of the section algebra of equivariant bundles of compact operators. In work with Ulrich Pennig, we prove that each exponential functor on the category of finite-dimensional complex inner product spaces and isomorphisms gives rise to an equivariant higher (ie. non-classical) twist of K-theory over G=SU(n), employing the section algebra of a locally trivial bundle with stabilised strongly self-absorbing fibres.

Using a version of the Mayer-Vietoris spectral sequence we compute the equivariant higher twisted K-groups for arbitrary exponential functor twists over SU(2), and also over SU(3) after rationalisation.

Updated on Feb 21, 2020 08:54 AM PST

Location: MSRI: Simons Auditorium
Speakers: Rune Haugseng (Norwegian University of Science and Technology (NTNU))

There are three useful ways to think about a monad on an ∞-category C: as an associative algebra in endofunctors of C, as a monadic right adjoint functor to C, and as a functor from the universal monad 2-category to the (∞,2)-category of ∞-categories. These notions are known to be equivalent, thanks to work of Lurie and Riehl-Verity - but only for ∞-groupoids of monads. I will explain how to upgrade this comparison to take morphisms of monads into account. One comparison involves a general equivalence between colax morphisms of adjunctions in an (∞,2)-category and commutative squares between right adjoints, which can be proved using the expected properties of the Gray tensor product, together with results of Riehl-Verity and Zaganidis. The other (which I will probably say less about) requires comparing the natural transformations between (∞,2)-categories viewed as cocartesian fibrations over the simplex category to certain colax transformations (generalizing the "icons" of Lack).

Updated on Feb 20, 2020 11:49 AM PST
11. HC & QS - Graduate Student Seminar: About lines and circles: the bordism category in dimension 1 & Frobenius algebras and embedded surfaces

Location: MSRI: Baker Board Room
Speakers: Jan Steinebrunner (University of Oxford), Dominic Weiller (Australian National University)

Abstract for Jan Steinbrunner:

The 1-dimensional bordism category Cob_1 is easily defined: objects are finite oriented sets and morphisms are diffeomorphism classes of 1-dimensional bordisms, in other words: lines and circles. A close relative of Cob_1 is the (infinity,1)-category Bord_1. This is a more fancy version of Cob_1 where we don't identify diffeomorphic bordisms, but rather assemble them in an appropriate moduli space. I will recall both of these categories and how they are related. Then I'll explain why essentially the only difference between the two are the rotations of the circle, and how to make this statement precise. Finally, I'll use the universal property Bord_1 enjoys because of the cobordism hypothesis to compute the classifying space of Cob_1. Afterwards we can also talk about how to do this in dimension 2, how this relates to topological cyclic homology of \Omega X, or about any other questions that come up during the talk.

Updated on Feb 20, 2020 11:10 AM PST
12. HC & QS - Configuration spaces and Diffeomorphisms:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:25 AM PST
13. Joint HC & QS Colloquium:

Location: MSRI: Simons Auditorium
Created on Jan 27, 2020 03:27 PM PST
14. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
15. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:25 AM PST
16. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Simons Auditorium
Updated on Feb 20, 2020 02:26 PM PST
17. HC & QS - Blob Homology

Location: MSRI: Simons Auditorium
Updated on Feb 10, 2020 10:40 AM PST
18. QS - Seminar

Location: MSRI: Simons Auditorium
Created on Jan 28, 2020 09:21 AM PST
19. HC & QS - Graduate Student Seminar

Location: MSRI: Baker Board Room
Updated on Feb 13, 2020 08:49 AM PST
20. HC & QS - Configuration spaces and Diffeomorphisms:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:26 AM PST
21. Joint HC & QS Colloquium:

Location: MSRI: Simons Auditorium
Created on Jan 27, 2020 03:27 PM PST
22. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
23. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:25 AM PST
24. HC & QS - Configuration spaces and Diffeomorphisms:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:26 AM PST
25. Joint HC & QS Colloquium:

Location: MSRI: Simons Auditorium
Created on Jan 27, 2020 03:27 PM PST
26. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
27. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:25 AM PST
28. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Simons Auditorium
Updated on Feb 20, 2020 02:27 PM PST
29. HC & QS - Blob Homology

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:45 AM PST
30. QS - Seminar

Location: MSRI: Simons Auditorium
Created on Jan 28, 2020 09:21 AM PST
31. HC & QS - Graduate Student Seminar

Location: MSRI: Baker Board Room
Updated on Feb 13, 2020 08:51 AM PST
32. HC & QS - Configuration spaces and Diffeomorphisms:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:26 AM PST
33. Joint HC & QS Colloquium:

Location: MSRI: Simons Auditorium
Created on Jan 27, 2020 03:27 PM PST
34. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
35. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:25 AM PST
36. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Simons Auditorium
Updated on Feb 20, 2020 02:27 PM PST
37. HC & QS - Blob Homology

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:45 AM PST
38. QS - Seminar

Location: MSRI: Simons Auditorium
Created on Jan 28, 2020 09:21 AM PST
39. HC & QS - Graduate Student Seminar

Location: MSRI: Baker Board Room
Updated on Feb 13, 2020 08:51 AM PST
40. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
41. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:26 AM PST
42. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Simons Auditorium
Updated on Feb 20, 2020 02:28 PM PST
43. HC & QS - Blob Homology

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:45 AM PST
44. QS - Seminar

Location: MSRI: Simons Auditorium
Created on Jan 28, 2020 09:21 AM PST
45. HC & QS - Graduate Student Seminar

Location: MSRI: Baker Board Room
Updated on Feb 13, 2020 08:52 AM PST
46. HC & QS - Configuration spaces and Diffeomorphisms:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:26 AM PST
47. Joint HC & QS Colloquium:

Location: MSRI: Simons Auditorium
Created on Jan 27, 2020 03:27 PM PST
48. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
49. HC Seminar:

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 03:30 PM PST
50. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Simons Auditorium
Updated on Feb 20, 2020 02:28 PM PST
51. HC & QS - Blob Homology

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:46 AM PST
52. QS - Seminar

Location: MSRI: Simons Auditorium
Created on Jan 28, 2020 09:21 AM PST
53. HC & QS - Graduate Student Seminar

Location: MSRI: Baker Board Room
Updated on Feb 13, 2020 08:53 AM PST
54. HC & QS - Configuration spaces and Diffeomorphisms:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:27 AM PST
55. Joint HC & QS Colloquium:

Location: MSRI: Simons Auditorium
Created on Jan 27, 2020 03:27 PM PST
56. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
57. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:27 AM PST
58. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Simons Auditorium
Updated on Feb 20, 2020 02:28 PM PST
59. HC & QS - Blob Homology

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:46 AM PST
60. QS - Seminar

Location: MSRI: Simons Auditorium
Created on Jan 28, 2020 09:21 AM PST
61. HC & QS - Graduate Student Seminar

Location: MSRI: Baker Board Room
Updated on Feb 13, 2020 08:53 AM PST
62. HC & QS - Configuration spaces and Diffeomorphisms:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:26 AM PST
63. Joint HC & QS Colloquium:

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 03:27 PM PST
64. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
65. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:26 AM PST
66. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Baker Board Room
Updated on Feb 20, 2020 02:28 PM PST
67. HC & QS - Blob Homology

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:46 AM PST
68. QS - Seminar

Location: MSRI: Baker Board Room
Created on Jan 28, 2020 09:24 AM PST
69. HC & QS - Graduate Student Seminar

Location: MSRI: Baker Board Room
Updated on Feb 13, 2020 08:54 AM PST
70. HC & QS - Configuration spaces and Diffeomorphisms:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:27 AM PST
71. Joint HC & QS Colloquium:

Location: MSRI: Simons Auditorium
Created on Jan 27, 2020 03:27 PM PST
72. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
73. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:27 AM PST
74. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Simons Auditorium
Updated on Feb 20, 2020 02:28 PM PST
75. HC & QS - Blob Homology

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:46 AM PST
76. QS - Seminar

Location: MSRI: Simons Auditorium
Created on Jan 28, 2020 09:21 AM PST
77. HC & QS - Graduate Student Seminar

Location: MSRI: Baker Board Room
Updated on Feb 13, 2020 08:54 AM PST
78. HC & QS - Configuration spaces and Diffeomorphisms:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:27 AM PST
79. Joint HC & QS Colloquium:

Location: MSRI: Simons Auditorium
Created on Jan 27, 2020 03:27 PM PST
80. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
81. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:27 AM PST
82. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Simons Auditorium
Updated on Feb 20, 2020 02:28 PM PST
83. HC & QS - Blob Homology

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:46 AM PST
84. QS - Seminar

Location: MSRI: Simons Auditorium
Created on Jan 28, 2020 09:21 AM PST
85. HC & QS - Graduate Student Seminar

Location: MSRI: Baker Board Room
Updated on Feb 13, 2020 08:54 AM PST
86. HC & QS - Learning Seminar

Location: MSRI: Baker Board Room
Created on Jan 27, 2020 04:08 PM PST
87. HC Seminar - Operadic Category Theory:

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 11:27 AM PST
88. HC&QS - Joint Newcomers Seminar:

Location: MSRI: Simons Auditorium
Updated on Feb 20, 2020 02:29 PM PST
89. HC & QS - Blob Homology

Location: MSRI: Baker Board Room
Updated on Feb 10, 2020 10:46 AM PST
90. QS - Seminar

Location: MSRI: Simons Auditorium
Created on Jan 28, 2020 09:21 AM PST
No upcoming events under African Diaspora Joint Mathematics Workshop

1. Seminar5-Minute Talks

Updated on Feb 12, 2020 03:41 PM PST
2. Seminar5-Minute Talks

Updated on Feb 12, 2020 03:40 PM PST
3. SeminarQS - Seminar: Understanding fusion categories with elementary number theory

Updated on Feb 13, 2020 04:51 PM PST
4. Seminar5-Minute Talks

Updated on Feb 12, 2020 03:39 PM PST
5. SeminarHC & QS - Blob Homology: Modules and gluing

Updated on Feb 13, 2020 12:02 PM PST
6. SeminarHC - (infinity,2)-categories Working Group: Cartesian fibrations of (oo,2)-categories

Updated on Feb 13, 2020 11:54 AM PST
7. SeminarHC Special Seminar - HoTT Electronic Seminar Talks (HoTTEST): The Constructive Kan-Quillen Model Structure

Updated on Feb 18, 2020 08:40 AM PST
8. Seminar5-Minute Talks

Updated on Feb 12, 2020 03:39 PM PST
9. SeminarHC&QS - Joint Newcomers Seminar (Part1): Introduction to quantum link homology & Hilbert schemes of affine spaces and their motives

Updated on Feb 13, 2020 04:50 PM PST
10. SeminarHC - (infinity,2)-categories Working Group: The Gray tensor product for 2-quasi-categories

Updated on Feb 13, 2020 11:52 AM PST
11. SeminarHC Seminar: Operadic Categories and Applications

Updated on Feb 13, 2020 12:00 PM PST
12. SeminarHC & QS - Configuration spaces and Diffeomorphisms: Derived mapping spaces for little disk operads

Updated on Feb 04, 2020 03:19 PM PST
13. SeminarHC - (infinity,2)-categories Working Group: On the equivalence of all models for (oo,2)-categories

Updated on Feb 13, 2020 11:50 AM PST
14. SeminarProblem Session

Created on Feb 13, 2020 09:36 AM PST
15. SeminarQS - Seminar: On higher Gauss sums and central charges of modular categories

Updated on Jan 30, 2020 09:51 AM PST
16. SeminarHC-Special Seminar: 2-quasi-categories and theta_2-spaces

Created on Jan 29, 2020 08:37 AM PST
17. SeminarReading group on Blob Homology: Back to the blob complex

Updated on Jan 31, 2020 09:47 AM PST
18. SeminarHC&QS - Joint Newcomers Seminar (Part 2): Quantum Hamiltonian reduction on symmetric spaces & Galois symmetries of knot spaces

Updated on Jan 30, 2020 10:41 AM PST
19. SeminarHC&QS - Joint Newcomers Seminar (Part 1): Isovariant homotopy theory & Holomorphic factorization methods in QFT

Updated on Jan 30, 2020 10:42 AM PST
20. SeminarHC Seminar: Discussing topics for the HC Seminar

Updated on Jan 30, 2020 03:07 PM PST
21. SeminarHC-Special Seminar: 2-fold complete Segal spaces (Part 2)

Updated on Jan 29, 2020 12:14 PM PST
22. SeminarHC-Special Seminar: 2-fold complete Segal spaces and Theta-2-spaces (Part 1)

Updated on Jan 30, 2020 02:24 PM PST
23. SeminarHC&QS - Configuration spaces and Diffeomorphisms: Introduction

Created on Jan 31, 2020 01:33 PM PST
24. SeminarReading group on Blob Homology: Disklike n-categories and string diagrams

Updated on Jan 31, 2020 09:46 AM PST
25. SeminarJoint HC & QS Colloquium: The 1-dimensional cobordism hypothesis

Updated on Jan 30, 2020 09:10 AM PST
26. SeminarHC-Special Seminar: 2-complicial sets (Part 2)

Updated on Jan 29, 2020 12:11 PM PST
27. SeminarHC-Special Seminar: A complicial compendium (Part 1)

Updated on Jan 30, 2020 02:52 PM PST
28. SeminarHow CRISPR genome editing technology is changing the future of humanity

Updated on Jan 08, 2020 03:44 PM PST
29. SeminarHoTT Electronic Seminar Talks (HoTTEST): The language of a model category

Updated on Jan 21, 2020 01:16 PM PST
30. SeminarHDMP - Physics: a guide for the perplexed

Updated on Dec 10, 2019 08:29 AM PST
There are more then 30 past seminars. Please go to Past seminars to see all past seminars.