Now showing items 1-10 of 19
Weakly Complex Homogeneous Spaces
[OWP-2012-04] (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] (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] (Mathematisches Forschungsinstitut Oberwolfach, 2012-04-24)
Commuting Differential Operators and Higher-dimensional Algebraic Varieties
[OWP-2012-02] (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] (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] (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] (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] (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] (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] (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 ...