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Dr. Ben Hermann vertritt die Professur IT-Sicherheit an der Universität Paderborn
Seit dem Wintersemester 19/20 hat die Fachgruppe IT-Sicherheit eine neue Leitung. Dr. Ben Hermann vom Heinz Nixdorf ...
Publikationen
Fischer, Matthias;Lukovszki, Tamás;Ziegler, Martin:
* k determines the amount of space required for storing PNGs.
* Many algorithms employing a (previously constructed) spanner have running times depending on its outdegree.
Our results include, for fixed dimensions d as well as asymptotically, upper and lower bounds on this optimal value of k. The upper bounds are shown constructively and yield efficient algorithms for actually computing the corresponding PNGs even in degenerate cases.
paper-full.pdf
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Partitioned Neighborhood Spanners of Minimal Outdegree.
In: Proceedings of the 11th Canadian Conference on Computational Geometry (CCCG'99), S. 47-50, Sep. 1999Abstract
A geometric spanner with vertex set P in Rd is a sparse approximation of the complete Euclidean graph determined by P. We introduce the notion of partitioned neighborhood graphs (PNGs), unifying and generalizing most constructions of spanners treated in literature. Two important parameters characterizing their properties are the outdegree k in N and the stretch factor f>1 describing the quality of approximation. PNGs have been throughly investigated with respect to small values of f. We present in this work results about small values of k. The aim of minimizing k rather than f arises from two observations:* k determines the amount of space required for storing PNGs.
* Many algorithms employing a (previously constructed) spanner have running times depending on its outdegree.
Our results include, for fixed dimensions d as well as asymptotically, upper and lower bounds on this optimal value of k. The upper bounds are shown constructively and yield efficient algorithms for actually computing the corresponding PNGs even in degenerate cases.
Weblink
www.cccg.caDateien
paper.pdfpaper-full.pdf
Bibtex
@inproceedings{key=FLZ1999,
author = {Fischer, Matthias and Lukovszki, Tamás and Ziegler, Martin},
title = {Partitioned Neighborhood Spanners of Minimal Outdegree},
booktitle = {Proceedings of the 11th Canadian Conference on Computational Geometry (CCCG'99)},
pages = {47-50},
month = sep,
year = {1999},
}
author = {Fischer, Matthias and Lukovszki, Tamás and Ziegler, Martin},
title = {Partitioned Neighborhood Spanners of Minimal Outdegree},
booktitle = {Proceedings of the 11th Canadian Conference on Computational Geometry (CCCG'99)},
pages = {47-50},
month = sep,
year = {1999},
}
BibTeX in die Zwischenablage kopieren