UNITARY EXTENSIONS OF TWO-PARAMETER LOCAL SEMIGROUPS OF ISOMETRIC OPERATORS AND THE KREIN EXTENSION THEOREM

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DC Field	Value	Language
dc.contributor.author	Bruzual, Ramón	-
dc.date.accessioned	2013-12-04T19:38:56Z	-
dc.date.available	2013-12-04T19:38:56Z	-
dc.date.issued	1993	-
dc.identifier.issn	0378-620X	-
dc.identifier.uri	http://hdl.handle.net/10872/5227	-
dc.description.abstract	A notion of two-parameter local semigroups of isometric operators in Hilbert space is discussed. It is shown that under certain conditions such a semigroup can be extended to a strongly continuous two-parameter group of unitary operators in a larger Hilbert space. As an application a simple proof of the Eskin bidimensional version of the Krein extension theorem is given.	es_VE
dc.language.iso	en	es_VE
dc.publisher	Integral equations and operator theory.	es_VE
dc.relation.ispartofseries	;10	-
dc.subject	extension	es_VE
dc.subject	unitary group	es_VE
dc.title	UNITARY EXTENSIONS OF TWO-PARAMETER LOCAL SEMIGROUPS OF ISOMETRIC OPERATORS AND THE KREIN EXTENSION THEOREM	es_VE
dc.type	Article	es_VE
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