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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(online) ISSN 0002-9939(print)

The simple-zero theorem for support points in $ \Sigma$


Authors: Y. J. Leung and G. Schober
Journal: Proc. Amer. Math. Soc. 105 (1989), 603-608
MSC: Primary 30C70; Secondary 30C50
MathSciNet review: 948155
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Abstract: The purpose of this article is to confirm a simple-zero conjecture raised by the second author for support points in $ \Sigma $. The conjecture implies that the omitted arcs of an extremal function in $ \Sigma $ for a linear problem can branch out in, at most, three equiangular directions at a time.


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DOI: http://dx.doi.org/10.1090/S0002-9939-1989-0948155-X
PII: S 0002-9939(1989)0948155-X
Article copyright: © Copyright 1989 American Mathematical Society