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TitleCylinders through five points: Complex and real enumerative geometry.
Author(s) Daniel Lichtblau
TypeBook, Chapter in Book, Conference Proceeding
AbstractIt is known that five points in ℝ3 generically determine a finite number of cylinders containing those points. We discuss ways in which it can be shown that the generic (complex) number of solutions, with multiplicity, is six, of which an even number will be real valued and hence correspond to actual cylinders in ℝ3. We partially classify the case of no real solutions in terms of the geometry of the five given points. We also investigate the special case where the five given points are coplanar, as it differs from the generic case for both complex and real valued solution cardinalities.
KeywordsEnumerative geometry, Gröbner bases, nonlinear systems
ISBN978-3-540-77355-9/pbk
URL http://link.springer.com/chapter/10.1007%2F978-3-540-77356-6_6
LanguageEnglish
Pages80--97
PublisherBerlin: Springer
Year2007
Edition0
Translation No
Refereed No
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