some properties of fuzzy hilbert spaces and norm of operators

Authors

abbas hasankhani

akbar nazari

morteza saheli

abstract

in the present paper we define the notion of fuzzy inner productand study the properties of the corresponding fuzzy norm. in particular, it isshown that the cauchy-schwarz inequality holds. moreover, it is proved thatevery such fuzzy inner product space can be imbedded in a complete one andthat every subspace of a fuzzy hilbert space has a complementary subspace.finally, the notions of fuzzy boundedness and operator norm are introducedand the relationship between continuity and boundedness are investigated. itis shown also that the space of all fuzzy bounded operators is complete.

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Journal title:
iranian journal of fuzzy systems

Publisher: university of sistan and baluchestan

ISSN 1735-0654

volume 7

issue 3 2010

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