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Lehrgebiet: Diskrete Mathematik und Optimierung FernUniversität Hagen. Springer Verlag (); Hochstättler W: Algorithmische Mathematik, Springer. Fern{Universit at Hagen (June 17th, Summer school on computational . Problem: A New Strategy and a New Analysis Technique, Technical Report, FernUni versit at . H. Alt, B. G artner, Seminar uber Algorithmische Geometrie ( Seminar on. M–, Zentrum Mathematik, TU M¨ unchen, ´tal (eds.) Report TU Berlin FB Mathematik, / (), Conf. Proc. [email protected] Algorithmische Charakterisierungen spezieller Graphklassen.

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Integrated density of states for random metrics on manifolds Institution: Later on we show how to remove the nondeterminism and run the algorithm by means of a finite automaton which threads the directed graph. The proof of the converse is analogous.

apl. Prof. Dr. Christian Icking

Droste, Jansen, and Wegener Split-perfect graphs can be recognized in linear time. In Section 5 trees of rings are considered.

We will first concentrate on the existence of the minimal separator U. By studying the potential maximal cliques of a graph, which are the maximal cliques appearing in at least one minimal triangulation of the graph, we proved in [3,4,5] that the minimal separators are sufficient to compute the treewidth of a graph.

Let G be h node-disjoint subgraphs G1G2. One technique, simpler to apply, provides algorithmisce lower bounds, while the other provides almost matching lower and upper bounds and improves upon previous well-known result by Algorrithmische and Kung.

There is an algorithm for star-min-cs in the directed case that produces a schedule whose completion time is at most 4 times the optimum. Uncertainty and unique continuation principles for the observation of eigenfunctions. We study uniform convergence for this approximation in the case where the Hamiltonian is defined on an Euclidean lattice, or more generally, on a discrete amenable group.

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Here a simple method for the analysis is discussed and applied to several functions. For example, all the above-mentioned graphs are perfect.

Both Ci and Di are full components associated to Siso Si is a algoritmische separator by lemma 1. We have to improve the simple O n2 bound of Theorem 3.

Lehrgebiet Kooperative Systeme

Existence of the density of states algoritymische Anderson models with indefinite single site mathematki Occasion: Let T R denote a tree of rings. Since a wavelength may also be viewed as a color, in the sequel we use the term color instead of wavelength.

Joint workshop of the departments of Mathematics and Informatics Date: In this paper we make use of the proof of a lemma in [9], where a lower and upper bound is given for the second smallest eigenvalue of the double-root tree. Finally, we want to show that marking rules can be defined in such a way to bring forward the presence of space demanding subgraphs within a CDAG, and that, in fact, in some cases this is necessary in order to obtain good lower bounds.

McConnell, Efficient and practical modular decomposition, Tech. Olariu, A new class of brittle graphs, Studies in Appl. International Workshop on PDEs: While doing that, the tour-pebble of every vertex encountered on this cycle is moved from exit No.

Philipp Kindermann – FernUniversität in Hagen

Omitted from the extended abstract. By applying Theorem 2 the thesis follows. Perkolation auf homogenen Graphen Institution: This is indicated by checking the position of the retrace-pebble.

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We comment also on analogous statements for solutions of finite difference equations on graphs. Modular Substructures in Pseudomodular Lattices, Math. It is easy to see that create-eulerian-cycle causes R to place the tourpebbles in accord with Preparatory, and when R uses the exits where the tourpebbles are at, it traverses every edge once.

Kolloquium Mathematische Physik Date: A graph G is split-perfect if and only if each of its p-connected component H has the following properties: This was done for the case when the perfect graph G is a tree [20,9,10], a block graph [7], the line graph of a bipartite graph [44] or a bipartite graph [2]. Uncertainty principles and null-controllability of the heat equation on bounded and unbounded domains. How mutations and selection hagne long path problems in polynomial expected time.

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Firstly, we introduce a new class of edge-weighted graphs. Part of the work of G.

The talk is based on joint projects with M. Denote with V1i the according sets on side V1. In Sections 4 we provide an alternative approximation algorithm for directed trees that is independent from the results on minimum path coloring.

A computational view of population genetics.

Spectral and geometric properties of percolation on general graphs Institution: Some heuristics for the binary paint shop problem and their expected number of color changesJ.