Chansangiam, Pattrawut
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Preferred name
Chansangiam, Pattrawut
Alternative Name
Chansangiam, P.
Main Affiliation
Email
pattrawut.ch@kmitl.ac.th
3 results
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Item type:Publication, Analytic properties of tracy-singh products for operator matrices(2018-01-01); Lewkeeratiyutkul, WicharnWe show that the Tracy-Singh product of Hilbert space operators is continuous with respect to the operator-norm topology. The Tracy-Singh product of two nonzero operators is compact if and only if both factors are compact. We provide upper and lower bounds for certain Schatten p-norms of the Tracy-Singh product of operators. It turns out that this product is continuous with respect to the topologies on norm ideals of compact operators, trace class operators, and Hilbert-Schmidt class operators. Thus the Tracy-Singh product preserves such classes of operators. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Algebraic and order properties of tracy-singh products for operator matrices(2018-01-01); Lewkeeratiyutkul, WicharnWe generalize the tensor product for operators to the Tracy-Singh product for operator matrices acting on the direct sum of Hilbert spaces. This kind of operator product is compatible with algebraic operations and order relations for operators. It follows that this product preserves many structure properties of operators. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Tracy-singh products and classes of operators(2019-07-01); Lewkeeratiyutkul, WicharnWe investigate relationship between Tracy-Singh products and certain classes of Hilbert space operators. We show that the normality, hyponormality, paranormality of operators are preserved by Tracy-Singh products. Operators of class-A type are also preserved under Tracy-Singh products. Moreover, we obtain necessary and sufficient conditions for the Tracy- Singh product of two operators to be normal, quasinormal, (co)isometry, and unitary.