Archived Events

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Topos Theory [2]

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Talk [3]

Speaker:

David Carchedi

Date:

Wed, 2013-04-17 16:15 - 18:00

Location:

MPIM Seminar Room [4]

Parent event:

Master's Course on Topos Theory [5]

Boundary conditions for 3d TQFTs and module categories [6]

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Talk [3]

Speaker:

Alessandro Valentino

Affiliation:

Hamburg

Date:

Wed, 2013-04-17 10:30 - 12:00

Location:

MPIM Lecture Hall [7]

Parent event:

Higher Differential Geometry Seminar [8]

In this talk I will discuss some aspects of boundary conditions for a 3d TFT of Reshetikhin-Turaev type, and their description in terms of module categories.

K3 Surfaces of High Picard Rank [9]

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Talk [3]

Speaker:

Adiran Clingher

Affiliation:

U of Missouri - St. Louis/MPI

Date:

Tue, 2013-04-16 15:00 - 15:50

Location:

MPIM Lecture Hall [7]

Parent event:

Seminar on Algebra, Geometry and Physics [10]

The talk will focus on a special class of complex algebraic K3 surfaces of Picard rank 16 or higher. I will discuss a classification of these objects in terms of modular forms of appropriate type.

Topology, rigid cosymmetries and linearization instability in higher gauge theories [11]

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Talk [3]

Speaker:

Igor Khavkine

Affiliation:

Inst. for Theoretical Physics, Utrecht U

Date:

Tue, 2013-04-16 14:00 - 14:50

Location:

MPIM Lecture Hall [7]

Parent event:

Seminar on Algebra, Geometry and Physics [10]

We consider a class of non-linear PDE systems, whose equations possess Noether identities (the equations are redundant), including non-variational systems (not coming from Lagrangian field theories), where Noether identities and infinitesimal gauge transformations need not be in bijection. We also include theories with higher stage Noether identities, known as higher gauge theories (if they are variational).

Read more [11]

Stability Conditions on K3 surfaces (after Bridgeland) [12]

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Talk [3]

Speaker:

Nicolo Sibilla

Affiliation:

MPI

Date:

Mon, 2013-04-15 16:15 - 17:45

Location:

MPIM Seminar Room [4]

Parent event:

Derived categories of coherent sheaves [13]

Equivariant Morse theory [14]

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Talk [3]

Speaker:

J. Loeffler

Date:

Mon, 2013-04-15 14:15 - 15:45

Location:

MPIM Seminar Room [4]

Parent event:

IMPRS-seminar on moduli of G-bundles [15]

The birth of DST: Bing's 1952 exotic involution of the 3-sphere [16]

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Talk [3]

Speaker:

R. Edwards

Date:

Mon, 2013-04-15 12:00 - 13:30

Location:

MPIM Lecture Hall [7]

Parent event:

IMPRS Minicourse [17]

Parent event:

Lecture Series on Bing topology and Casson handles [18]

Video:

20130415_edwards1a.mp4 [19]

20130415_edwards1b.mp4 [20]

Pi_1 negligible embeddings in 4-manifolds, and applications [21]

Posted in

Talk [3]

Speaker:

Frank Quinn

Date:

Fri, 2013-04-12 10:30 - 12:00

Location:

MPIM Lecture Hall [7]

Parent event:

Classification of Topological 4-manifolds (Semester on 4-manifolds) [22]

Parent event:

Lecture Series on 4-manifolds [23]

http://people.mpim-bonn.mpg.de/teichner/Math/4-Manifolds.html

Habilitationsvortrag [24]

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Talk [3]

Speaker:

Thomas Vogel

Affiliation:

MPI

Date:

Thu, 2013-04-11 16:30 - 17:30

Location:

MPIM Lecture Hall [7]

Details:

Program [25] and Abstracts [26] of Habilitationsvortrag

Uniqueness of the contact structure approximating a foliation [27]

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Talk [3]

Speaker:

Thomas Vogel

Affiliation:

MPI

Date:

Thu, 2013-04-11 16:30 - 17:30

Location:

MPIM Lecture Hall [7]

Parent event:

Oberseminar Differentialgeometrie [28]

According to a theorem of Eliashberg and Thurston a C²-foliation on a closed 3-manifold can be C⁰-approximated by contact structures unless all leaves of the foliation are spheres. Examples on the 3-torus show that every neighbourhood of a foliation can contain
infinitely many non-diffeomorphic contact structures. In this talk we show that this is rather exceptional: In many interesting situations the contact structure in a sufficiently small

Read more [27]