Chansangiam, Pattrawut
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Preferred name
Chansangiam, Pattrawut
Alternative Name
Chansangiam, P.
Main Affiliation
Email
pattrawut.ch@kmitl.ac.th
8 results
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Item type:Publication, Convexity and monotonicity of certain maps involving hadamard products and bochner integrals for continuous fields of operators(2019-10-30)We investigate the convexity and the monotonicity of certain maps involving Hadamard products and Bochner integrals for continuous fields of Hilbert space operators. Their special cases and consequences are then discussed. In particular, we obtain certain arithmetic mean-harmonic mean, Jensen, and Fiedler type inequalities. - Some of the metrics are blocked by yourconsent settings
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, Khatri-Rao products and selection operators(2019-08-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Kantorovich type integral inequalities for tensor products of continuous fields of positive operators(2018-01-01)This paper establishes a number of Kantorovich type integral inequalities involving tensor products of continuous fields of positive operators parametrized by a locally compact Hausdorff space. Such integrals appear as Bochner integrals with respect to a finite Radon measure on that space. Kantorovich type inequalities in which the operator product are replaced by an operator mean are also investigated. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Khatri-rao sums for hilbert space operators(2018-05-01) - 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Algebraic, order, and analytic properties of Tracy-Singh sums for Hilbert space operators(2019-07-01)