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Positive semidefinite germs in real analytic surfaces.


Fernando Galván, José Francisco (2002) Positive semidefinite germs in real analytic surfaces. Mathematische Annalen, 322 (1). pp. 49-67. ISSN 0025-5831

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We find all real analytic surface germs in R3 on which every positive semidefinite function germ is a sum of squares (in fact, of two squares) of analytic function germs.

Item Type:Article
Uncontrolled Keywords:Sums of squares; Analytic rings; Analytic function germs; Positive semidefinite functions; Brieskorn singularity
Subjects:Sciences > Mathematics > Functional analysis and Operator theory
ID Code:15237

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