Search

Now showing items 1-10 of 19

Weakly Complex Homogeneous Spaces

[OWP-2012-04] Moroianu, Andrei; Semmelmann, Uwe (Mathematisches Forschungsinstitut Oberwolfach, 2012-04-24)

We complete our recent classification of compact inner symmetric spaces with weakly complex tangent bundle by filling up a case which was left open, and extend this classification to the larger category of compact homogeneous ...

On the autonomous metric on the group of area-preserving diffeomorphisms of the 2-disc

[OWP-2012-16] Brandenbursky, Michael; Kȩdra, Jarek (Mathematisches Forschungsinstitut Oberwolfach, 2012)

Let

$D^2$ be the open unit disc in the Euclidean plane and let

$G := Diff(D^2; area)$ be the group of smooth compactly supported area-preserving diffeomorphisms of

$D^2$ . For every natural number

$k$ we construct an injective ...

Categoric Aspects of Authentication

[OWP-2012-05] Schillewaert, Jeroen; Thas, Koen (Mathematisches Forschungsinstitut Oberwolfach, 2012-04-24)

Commuting Differential Operators and Higher-dimensional Algebraic Varieties

[OWP-2012-02] Kurke, Herbert; Osipov, Denis; Zheglov, Alexander (Mathematisches Forschungsinstitut Oberwolfach, 2012-03-20)

Several algebro-geometric properties of commutative rings of partial differential operators as well as several geometric constructions are investigated.

A Uniform Model for Kirillov-Reshetikhin Crystals I: Lifting the Parabolic Quantum Bruhat Graph

[OWP-2012-18] Lenart, Cristian; Naito, Satoshi; Sagaki, Daisuke; Schilling, Anne; Shimozono, Mark (Mathematisches Forschungsinstitut Oberwolfach, 2012)

We consider two lifts of the parabolic quantum Bruhat graph, one into the Bruhat order in the affine Weyl group and the other into a level-zero weight poset first considered by Littelmann. The lift into the affine Weyl ...

Contractive Idempotents on Locally Compact Quantum Groups

[OWP-2012-19] Neufang, Matthias; Salmi, Pekka; Skalski, Adam; Spronk, Nico (Mathematisches Forschungsinstitut Oberwolfach, 2012)

A general form of contractive idempotent functionals on coamenable locally compact quantum groups is obtained, generalising the result of Greenleaf on contractive measures on locally compact groups. The image of a convolution ...

Polynomiality, wall crossings and tropical geometry of rational double hurwitz cycles

[OWP-2012-13] Bertram, Aaron; Cavalieri, Renzo; Markwig, Hannah (Mathematisches Forschungsinstitut Oberwolfach, 2012-12-04)

We study rational double Hurwitz cycles, i.e. loci of marked rational stable curves admitting a map to the projective line with assigned ramification profiles over two fixed branch points. Generalizing the phenomenon ...

Module Categories for Group Algebras over Commutative Rings

[OWP-2012-12] Benson, David J.; Iyengar, Srikanth B.; Krause, Henning; Stevenson, Greg (Mathematisches Forschungsinstitut Oberwolfach, 2012-10-01)

We develop a suitable version of the stable module category of a finite group

$G$ over an arbitrary commutative ring

$k$ . The purpose of the construction is to produce a compactly generated triangulated category whose ...

K-Triviality, Oberwolfach randomness, and differentiability

[OWP-2012-17] Bienvenu, Laurent; Greenberg, Noam; Kučera, Antonin; Nies, André; Turetsky, Dan (Mathematisches Forschungsinstitut Oberwolfach, 2012-12-21)

We show that a Martin-Lof random set for which the effective version of the Lebesgue density theorem fails computes every

$K$ -trivial set. Combined with a recent result by Day and Miller, this gives a positive solution to ...

Spatial-Skin Effect for a Spectral Problem with "Slightly Heavy" Concentrated Masses in a Thick Cascade Junction

[OWP-2012-10] Čečkin, Grigorij A.; Mel'nyk, Taras A. (Mathematisches Forschungsinstitut Oberwolfach, 2012-07-03)

The asymptotic behavior (as

$\varepsilon \to 0$ ) of eigenvalues and eigenfunctions of a boundary- value problem for the Laplace operator in a thick cascade junction with concentrated masses is studied. This cascade junction ...