On Kreǐn's extension theory of non-negative operators

Hassi, Seppo; Malamud, Mark; Snoo, Henk de (2002)
 
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Hassi, Seppo
Malamud, Mark
Snoo, Henk de
Vaasan yliopisto
2002
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Julkaisun pysyvä osoite on
http://urn.fi/URN:NBN:fi-fe2019100330996
Tiivistelmä
The famous M.G. Kreın’s extension theory of nonnegative operators is being presented in elementary terms, building on the completion of nonnegative operator blocks. The present treatment includes the refinements to the theory due to T. Ando and K. Nishio. Moreover, the extension theory not only includes the case of operator extensions but also the case of relation (multivalued-operator) extensions.
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