Now showing items 1-20 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 $V_B$, ...
• #### 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 ...
• #### Simulation of Multibody Systems with Servo Constraints through Optimal Control ﻿

[OWP-2015-18] (Mathematisches Forschungsinstitut Oberwolfach, 2015)
We consider mechanical systems where the dynamics are partially constrained to prescribed trajectories. An example for such a system is a building crane with a load and the requirement that the load moves on a certain path. ...
• #### Milnor fibre homology via deformation ﻿

[OWP-2015-22] (Mathematisches Forschungsinstitut Oberwolfach, 2015)
In case of one-dimensional singular locus, we use deformations in order toget refined information about the Betti numbers of the Milnor fibre.
• #### A nested family of k-total effective rewards for positional games ﻿

[OWP-2015-21] (Mathematisches Forschungsinstitut Oberwolfach, 2015)
We consider Gillette's two-person zero-sum stochastic games with perfect information. For each $k \in \mathbb{Z}_+$ we introduce an effective reward function, called $k$-total. For $k = 0$ and $1$ this function is known ...
• #### Composition of Irreducible Morphisms in Quasi-Tubes ﻿

[OWP-2015-03] (Mathematisches Forschungsinstitut Oberwolfach, 2015-04-09)
We study the composition of irreducible morphisms between indecomposable modules lying in quasi-tubes of the Auslander-Reiten quivers of artin algebras $A$ in relation with the powers of the radical of their module category ...
• #### 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 ...
• #### Virtual Polytopes ﻿

[OWP-2015-02] (Mathematisches Forschungsinstitut Oberwolfach, 2015-04-10)
Originating in diverse branches of mathematics, from polytope algebra and toric varieties to the theory of stressed graphs, virtual polytopes represent a natural algebraic generalization of convex polytopes. Introduced as ...
• #### Maximal Cohen-Macaulay modules over non-isolated surface singularities and matrix problems ﻿

[OWP-2015-06] (Mathematisches Forschungsinstitut Oberwolfach, 2015-05-13)
In this article we develop a new method to deal with maximal Cohen-Macaulay modules over non-isolated surface singularities. In particular, we give a negative answer on an old question of Schreyer about surface singularities ...
• #### Gibbs measures associated to the integrals of motion of the periodic derivative nonlinear Schrödinger equation ﻿

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