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The Universal Covers of Certain Semibiplanes

✍ Scribed by Barbara Baumeister; Dmitrii V. Pasechnik


Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
227 KB
Volume
18
Category
Article
ISSN
0195-6698

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πŸ“œ SIMILAR VOLUMES


Universal abelian covers of superisolate
✍ Jan Stevens πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 266 KB

## Abstract We give explicit examples of Gorenstein surface singularities with integral homology sphere link, which are not complete intersections. Their existence was shown by Luengo–Velasco, Melle–HernΓ‘ndez and NΓ©methi, thereby providing counterexamples to the universal abelian covering conjectur

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✍ S. Yoshiara πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 English βš– 231 KB

A sufficient condition for the simple connectedness is given for an infinite family of extended generalized quadrangles Y(S) of order (q + 1, q -1) constructed in [7] from a family S of planes in PG(5, q) with some conditions. Applying this, Y(S) is shown to be simply connected when S is obtained fr

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✍ H. C. Hansen πŸ“‚ Article πŸ“… 1992 πŸ› Springer 🌐 English βš– 392 KB

The current smallest convex universal cover for sets of unit diameter is described. This reduction of Sprague's cover is by 4-10-J 1 and results in an asymmetrical cover. Another small universal cover of sets of unit diameter with an axis of symmetry reduces Sprague's cover by 0.0019. An indication