Events at the Department of Mathematical Sciences. Search for certain years or days in the panel below.

13 February 2017,
15:1516:15
Algebra/Topology Seminar by Anthony Blanc (MPIM Bonn) Title: Formal deformations of categories Abstract: I will report on a joint work with Katzarkov and Pandit about the deformation theory of klinear dgcategories for a field k. In general, the Hochschild cohomology complex parametrizes curved A_infty deformations. After the work of Lurie, we show that under boundedness and the existence of a compact generator, every formal deformation is uncurved and possesses a compact generator. The proof uses a new description of the space of deformations in terms of !group actions on the category.
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13 February 2017,
13:1515:30
Presentations by Claudia Klüppelberg (TU Munich) , Richard Davis (Columbia University), Johannes Heiny (MATH) and Jeffrey Collamore (MATH)
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10 February 2017,
15:1516
Joshua Hunt will give a talk outlining how to construct a group with insolvable word problem, using Turing machines.
This lecture is part of the "What is..?" seminar.
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9 February 2017,
14:0016:00
Title: Noncommutative covering spaces and their symmetries
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8 February 2017,
15:15
Boualem Djehiche: Nonlinear prospective reserving for life insurance contracts
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8 February 2017,
15:1516:15
Seminar talk given by Eric Reckwerdt (IMPAN): "Relatively hyperbolic groups and weak amenability".
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8 February 2017,
14:15
Specialeforsvar ved Martin Emil Jakobsen
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6 February 2017,
15:1516:15
Title: Real models for the framed little ndisks operad
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30 January 2017,
15:1516:15
Algebra/Topology Seminar by Rune Haugseng (Copenhagen) Title: The AKSZ construction in derived algebraic geometry as an extended TQFT Abstract: The AKSZ construction, as implemented by PantevToënVaquiéVezzosi in the context of derived algebraicvgeometry, gives a symplectic structure on the derived stack of maps from an oriented compact manifold to a symplectic derived stack. I will describe how this gives rise to a family of extended topological field theories valued in higher categories of symplectic derived stacks, with the higher morphisms given by a notion of higher Lagrangian correspondences. This is joint work in progress with Damien Calaque and Claudia Scheimbauer.
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27 January 2017,
14:0015:00
Title: Algebraic models in stable homotopy theory
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27 January 2017,
13:15
Niklas Pfister: Estimating the causal structure using different environmental settings without knowing them
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24 January 2017,
14:3015:30
Algebra/Topology Seminar by Manuel Araújo (Oxford) Title: A presentation of the fully extended three dimensional framed bordism category Abstract: I will start with a short introduction to Topological Field Theory. Then I will explain how to obtain a finite presentation of the fully extended three dimensional framed bordism category, using the cobordism hypothesis.
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24 January 2017,
13:15
Title: Novel Mathematical neural models for visuel attention
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24 January 2017,
13:0014:00
Algebra/Topology Seminar by Sergio Estrada (University of Murcia). Title: Very flat modules and sheaves. Abstract: Very flat and contraadjusted modules naturally arise in Algebraic Geometry. They were defined by Positselski [arXiv:1209.2995]. We will summarize the main properties of these modules and of the corresponding class of sheaves. We will define a mock homotopy category of projectives on a quasicompact and semiseparated scheme by using very flat quasicoherent sheaves and show the existence of a recollement among the different homotopy categories involved. Sergio Estrada
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23 January 2017,
15:1516:15
Title: Computing stable homotopy groups of spheres  two methods.
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23 January 2017,
13:3014:30
Title: Derived intersection over the Hochschild cochain complex
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20 January 2017,
15:0016:00
DidMatseminar with Niels Grønbæk
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20 January 2017,
13:15
Giovanni Rosso (Cambridge)
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20 January 2017,
13:0014:00
Title: The LubinTate Theory of K(n)local Lie Algebras
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16 January 2017,
15:1516:15
Title: Segal approach for algebraic structures.
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13 January 2017,
15:01
DIKU/MATH Talk by Dexter Kozen, Cornell University.
NB! New time: starting at 3 pm.
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13 January 2017,
13:1514:45
Institutmøde for alle  studerende og ansatte.
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12 January 2017,
13:0014:00
Title: Geometric outer automrphisms of Fn
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11 January 2017,
15:30
Title: Real Topological Cyclic Homology
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11 January 2017,
14:0015:00
Seminar talk given by Gabor Szabo (University of Aberdeen): "On the classification problem for Rokhlin flows"
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