@inproceedings{17509,
author = {Peckhaus, Volker},
booktitle = {Rationalität, Realismus, Revision.Vorträge des 3. Internationalen Kongresses der Gesellschaft für Analytische Philosophie},
editor = {Nida-Rümelin, Julian},
pages = {833--841},
publisher = {Walter de Gruyter},
title = {{Abduktion und Heuristik}},
volume = {23},
year = {1999},
}
@article{17511,
abstract = {Rezension: Zbl. Math. 941.03002 (R. Murawski); MR 2001j:01030 (J.W. Dauben).},
author = {Peckhaus, Volker},
journal = {The Bulletin of Symbolic Logic},
pages = {433--450},
title = {{19th Century Logic: Between Philosophy and Mathematics (Wiederabdruck und Online-Fassung)}},
volume = {5},
year = {1999},
}
@misc{18312,
author = {Peckhaus, Volker},
booktitle = {Zentralblatt für Mathematik und ihre Grenzgebiete [Zbl. 901.03004]},
title = {{Frascolla, Pascquale, Wittgenstein’s Philosophy of Mathematics, Routledge: London/New York 1994}},
year = {1999},
}
@misc{18331,
author = {Peckhaus, Volker},
booktitle = {Zentralblatt für Mathematik und ihre Grenzgebiete [Zbl. 921.01017]},
title = {{Otte, Michael, “A Controversy on the Axiomatization of Arithmetic in Its Philosophical Context”, in: Conference on the History of Mathematics. Papers from the Conference Cetraro, Italy, September 8–12, 1988, hg. v. Massimo Galuzzi, Editoria Elettronica: Rende 1991, 465–485}},
year = {1999},
}
@misc{18329,
author = {Peckhaus, Volker},
booktitle = {Zentralblatt für Mathematik und ihre Grenzgebiete [Zbl. 918.01015]},
title = {{van Dalen, Dirk, “The Role of Language in Brouwer’s Work”, in: Ewa Orłowska (Hg.), Logic at Work. Essays Dedicated to the Memory of Helena Rasiowa, Physica-Verlag: Heidelberg 1999, 3–14}},
year = {1999},
}
@misc{18317,
author = {Peckhaus, Volker},
booktitle = {Zentralblatt für Mathematik und ihre Grenzgebiete [Zbl. 908.01013]},
title = {{Stelzner, Werner, Gottlob Frege. Jena und die Geburt der modernen Logik, ReFIT: Jena 1996}},
year = {1999},
}
@inproceedings{17864,
abstract = {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.
},
author = {Fischer, Matthias and Lukovszki, Tamas and Ziegler, Martin},
booktitle = {Proceedings of the 11th Canadian Conference on Computational Geometry},
title = {{Partitioned neighborhood spanners of minimal outdegree}},
year = {1999},
}
@article{18362,
author = {Tophinke, Doris},
journal = {Niederdeutsches Jahrbuch },
pages = {25--43},
title = {{Das kaufmännische Rechnungsbuch im Kontext städtisch-amtlicher Schriftlichkeit}},
volume = {122},
year = {1999},
}
@book{18451,
editor = {Tophinke, Doris},
publisher = {Narr (zugleich Habilitationsschrift Freiburg 1997)},
title = {{Handelstexte – Zu Textualität und Typik kaufmännischer Rechnungsbücher im Hanseraum des 14. und 15. Jahrhunderts}},
year = {1999},
}
@inproceedings{18576,
abstract = {In this paper we deal with two problems on star-shaped polygons. First, we present a Las-Vegas algorithm that uniformly at random creates a star-shaped polygon whose vertices are given by a point set ( S ) of ( n ) points in the plane that does not admit degenerate star-shaped polygons. The expected running time of the algorithm is ( O(n^2log n) ) and it uses ( O(n) ) memory. We call a star-shaped polygon degenerate if its kernel has 0 area.

Secondly, we show how to count all star-shaped polygons whose vertices are a subset of ( S ) in ( O(n^5log n) ) time and ( O(n) ) space. The algorithm can also be used for random uniform generation. We also present lower and upper bounds on the number of star-shaped polygons.},
author = {Sohler, Christian},
booktitle = {Proceedings of the 11th Canadian Conference on Computational Geometry ('CCCG'99)},
pages = {174--177},
title = {{Generating Random Star-Shaped Polygons}},
year = {1999},
}