Publications de Martin Niemeier

On Sub-determinants and the Diameter of Polyhedra

Friedrich Eisenbrand, Nicolai Hähnle, Martin Niemeier, Nicolas Bonifas, Marco Di Summa

We derive a new upper bound on the diameter of a polyhedron , where . The bound is polynomial in and the largest absolute value of a sub-determinant of , denoted by . More precisely, we show that the diameter of is bounded by . If is bounded, then we show ...

Springer2014

Coloring fuzzy circular interval graphs

Friedrich Eisenbrand, Martin Niemeier

Given a graph G with nonnegative node labels w, a multiset of stable sets S_1,...,S_k\subseteq V(G) such that each vertex v \in V(G) is contained in w(v) many of these stable sets is called a weighted coloring. The weighted coloring number \chi_w(G) is the ...

Elsevier2012

On sub-determinants and the diameter of polyhedra

Friedrich Eisenbrand, Nicolai Hähnle, Martin Niemeier, Nicolas Bonifas, Marco Di Summa

2012

Approximation Algorithms for Modern Multi-Processor Scheduling Problems

Martin Niemeier

This thesis is devoted to the design and analysis of algorithms for scheduling problems. These problems are ubiquitous in the modern world. Examples include the optimization of local transportation, managing access to concurrent resources like runways at a ...

EPFL2012

Partitioned real-time scheduling on heterogeneous shared-memory multiprocessors

Martin Niemeier

We consider several real-time scheduling problems on heterogeneous multiprocessor platforms, in which the different processors share a common memory pool. These include (i)~scheduling a collection of implicit-deadline sporadic tasks with the objective of m ...

2011

Real-time Avionics OptimizationMathematische Optimierung von Echtzeitsystemen im Flugzeugdesign

Friedrich Eisenbrand, Martin Niemeier

De Gruyter, Oldenbourg Wissenschaftsverlag GmbH2011

Covering Cubes and the Closest Vector Problem

Friedrich Eisenbrand, Nicolai Hähnle, Martin Niemeier

We provide the currently fastest randomized (1+epsilon)-approximation algorithm for the closest vector problem in the infinity-norm. The running time of our method depends on the dimension n and the approximation guarantee epsilon by 2^(O(n))(log(1/epsilon ...

Acm Order Department, P O Box 64145, Baltimore, Md 21264 Usa2011

Scheduling periodic tasks in a hard real-time environment

Friedrich Eisenbrand, Nicolai Hähnle, Martin Niemeier

We give a rigorous account on the complexity landscape of an important real-time scheduling problem that occurs in the design of software-based aircraft control. The goal is to distribute tasks

\tau_i=(c_i,p_i)

on a minimum number of identical machines a ...

Springer-Verlag2010

Solving an Avionics Real-Time Scheduling Problem by Advanced IP-Methods

Friedrich Eisenbrand, Martin Niemeier

We report on the solution of a real-time scheduling problem that arises in the design of software-based operation control of aircraft. A set of tasks has to be distributed on a minimum number of machines and offsets of the tasks have to be computed. The ta ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2010

Coloring Fuzzy Circular Interval Graphs

Friedrich Eisenbrand, Martin Niemeier

Computing the weighted coloring number of graphs is a classical topic in combinatorics and graph theory. Recently these problems have again attracted a lot of attention for the class of quasi-line graphs and more specifically fuzzy circular interval graphs ...

Elsevier2009