## Search

Now showing items 1-10 of 22

#### A Pseudo-Polynomial Algorithm for Mean Payoff Stochastic Games with Perfect Information and Few Random Positions

[OWP-2015-20] (Mathematisches Forschungsinstitut Oberwolfach, 2015)

We consider two-person zero-sum stochastic mean payoff games with perfect information, or BWR-games, given by a digraph $G = (V,E)$, with local rewards $r : E \to \mathbb{Z}$, and three types of positions: black $V_B$, ...

#### Realizing Spaces as Classifying Spaces

[OWP-2015-01] (Mathematisches Forschungsinstitut Oberwolfach, 2015-04-10)

Which spaces occur as a classifying space for fibrations with a given fibre? We address this question in the context of rational homotopy theory. We construct an infinite family of finite complexes realized (up to rational ...

#### Torsion-free Covers of Solvable Minimax Groups

[OWP-2015-15] (Mathematisches Forschungsinstitut Oberwolfach, 2015-11-18)

We prove that every finitely generated solvable minimax group can be realized as a quotient of a torsion-free solvable minimax group. This result has an application to the investigation of random walks on finitely generated ...

#### Cocharacter-closure and spherical buildings

[OWP-2015-12] (Mathematisches Forschungsinstitut Oberwolfach, 2015-07-29)

Let $k$ be a field, let $G$ be a reductive $k$-group and $V$ an affine $k$-variety on which $G$ acts. In this note we continue our study of the notion of cocharacter-closed $G(k)$-orbits in $V$. In earlier work we used a ...

#### Prediction and Quantification of Individual Athletic Performance

[OWP-2015-11] (Mathematisches Forschungsinstitut Oberwolfach, 2015-08-27)

We present a novel, quantitative view on the human athletic performance of individuals. We obtain a predictor for athletic running performances, a parsimonious model, and a training state summary consisting of three numbers, ...

#### Gibbs measures associated to the integrals of motion of the periodic derivative nonlinear Schrödinger equation

[OWP-2015-04] (Mathematisches Forschungsinstitut Oberwolfach, 2015-05-18)

We study the one dimensional periodic derivative nonlinear Schrödinger (DNLS) equation. This is known to be a completely integrable system, in the sense that there is an infinite sequence of formal integrals of motion $\int ...

#### Time and band limiting for matrix valued functions, an example

[OWP-2015-08] (Mathematisches Forschungsinstitut Oberwolfach, 2015-07-29)

The main purpose of this paper is to extend to a situation involving matrix valued orthogonal polynomials and spherical functions, a result that traces its origin and its importance to work of Claude Shannon in laying the ...

#### The algebra of differential operators for a Gegenbauer weight matrix

[OWP-2015-07] (Mathematisches Forschungsinstitut Oberwolfach, 2015-07-29)

In this work we study in detail the algebra of differential operators $\mathcal{D}(W)$ associated with a Gegenbauer matrix weight. We prove that two second order operators generate the algebra, indeed $\mathcal{D}(W)$ is ...

#### Noncommutative Marked Surfaces

[OWP-2015-16] (Mathematisches Forschungsinstitut Oberwolfach, 2015-11-18)

The aim of the paper is to attach a noncommutative cluster-like structure to each marked surface $\Sigma$. This is a noncommutative algebra $\mathcal{A}_\Sigma$ generated by “noncommutative geodesics” between marked points ...

#### A potential reduction algorithm for two-person zero-sum mean payoff stochastic games

[OWP-2015-19] (Mathematisches Forschungsinstitut Oberwolfach, 2015)

We suggest a new algorithm for two-person zero-sum undiscounted stochastic games focusing on stationary strategies. Given a positive real $\epsilon$, let us call a stochastic game $\epsilon$-ergodic, if its values from any ...