Now showing items 162-181 of 1793

• #### The Becker-Gottlieb Transfer: a Geometric Description ﻿

[OWP-2019-13] (Mathematisches Forschungsinstitut Oberwolfach, 2019-05-14)
In this note, we examine geometric aspects of the Becker-Gottlieb transfer in terms of the Umkehr and index maps, and rework some classic index theorems, using the cohomological formulae of the Becker-Gottlieb transfer. ...
• #### 0104 - Berechenbarkeitstheorie (Computability Theory) ﻿

[TB-2001-3] (2001) - (21 Jan - 27 Jan 2001)
• #### The Berry-Keating Operator on a Lattice ﻿

[OWP-2016-23] (Mathematisches Forschungsinstitut Oberwolfach, 2016-11-17)
We construct and study a version of the Berry-Keating operator with a built-in truncation of the phase space, which we choose to be a two-dimensional torus. The operator is a Weyl quantisation of the classical Hamiltonian ...
• #### Billiards and flat surfaces ﻿

[SNAP-2015-001-ENSNAP-2015-001-DE] (Mathematisches Forschungsinstitut Oberwolfach, 2015)
[also available in German] Billiards, the study of a ball bouncing around on a table, is a rich area of current mathematical research. We discuss questions and results on billiards, and on the related topic of flat surfaces.
• #### 1119 - Billiards, Flat Surfaces, and Dynamics on Moduli Spaces ﻿

[OWR-2011-25] (2011) - (08 May - 14 May 2011)
This workshop brought together people working on the dynamics of various flows on moduli spaces, in particular the action of SL$_2(\mathbb R)$ on flat surfaces. The new results presented covered properties of interval ...
• #### Birational Rowmotion on a Rectangle over a Noncommutative Ring ﻿

[OWP-2022-17] (Mathematisches Forschungsinstitut Oberwolfach, 2022-09-20)
We extend the periodicity of birational rowmotion for rectangular posets to the case when the base field is replaced by a noncommutative ring (under appropriate conditions). This resolves a conjecture from 2014. The proof ...
• #### Boundary Conditions for Scalar Curvature ﻿

[OWP-2021-01] (Mathematisches Forschungsinstitut Oberwolfach, 2021-01-04)
Based on the Atiyah-Patodi-Singer index formula, we construct an obstruction to positive scalar curvature metrics with mean convex boundaries on spin manifolds of infinite $K$-area. We also characterize the extremal case. ...
• #### 2006a - Boundary Element Methods ﻿

[OWR-2020-5] (2020) - (02 Feb - 08 Feb 2020)
The field of boundary element methods (BEM) relies on recasting boundary value problems for (mostly linear) partial differential equations as (usually singular) integral equations on boundaries of domains or interfaces. ...
• #### Boundary Representations of Operator Spaces, and Compact Rectangular Matrix Convex Sets ﻿

[OWP-2016-24] (Mathematisches Forschungsinstitut Oberwolfach, 2016-12-13)
We initiate the study of matrix convexity for operator spaces. We define the notion of compact rectangular matrix convex set, and prove the natural analogs of the Krein-Milman and the bipolar theorems in this context. We ...
• #### Bounded Weight Modules for Basic Classical Lie Superalgebras at Infinity ﻿

[OWP-2022-09] (Mathematisches Forschungsinstitut Oberwolfach, 2022-05-30)
• #### 0420 - Buildings and Curvature ﻿

[OWR-2004-23] (2004) - (09 May - 15 May 2004)
• #### 0804 - Buildings: Interactions with Algebra and Geometry ﻿

[OWR-2008-3] (2008) - (20 Jan - 26 Jan 2008)
• #### 1634 - C*-Algebras ﻿

[OWR-2016-40] (2016) - (21 Aug - 27 Aug 2016)
The field of operator algebras is a flourishing area of mathematics with strong ties to many other areas including functional/harmonic analysis, topology, (non-commutative) geometry, group theory and dynamical systems. The ...
• #### 0834 - C*-Algebras ﻿

[OWR-2008-37] (2008) - (17 Aug - 23 Aug 2008)
• #### 1933 - C*-Algebras ﻿

[OWR-2019-37] (2019) - (11 Aug - 17 Aug 2019)
The subject of Operator Algebras is a flourishing broad area of mathematics which has strong ties to many other areas in mathematics including Functional/Harmonic Analysis, Topology, (non-commutative) Geometry, Geometric ...
• #### 1244 - C*-Algebras, Dynamics, and Classification ﻿

[OWR-2012-52] (2012) - (28 Oct - 03 Nov 2012)
Classification is a central theme in mathematics, and a particularly rich one in the theory of operator algebras. Indeed, one of the first major results in the theory is Murray and von Neumann’s type classification of ...