Linear Mappings Characterized by Action on Zero Products or Unit Products
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DOI: 10.1007/s41980-020-00499-y
Abstract: Let $$\mathcal {A}$$ A be a unital algebra and $$\mathcal {M}$$ M be a unital $$\mathcal {A}$$ A -bimodule. We characterize the linear mappings $$\delta $$ δ and $$\tau $$ τ from $$\mathcal {A}$$ A… read more here.
Keywords: linear mappings; mathcal mathcal; delta tau; mappings characterized ... See more keywords
Specht's criterion for systems of linear mappings
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DOI: 10.1016/j.laa.2017.01.006
Abstract: Abstract W. Specht (1940) proved that two n × n complex matrices A and B are unitarily similar if and only if trace w ( A , A ⁎ ) = trace w ( B… read more here.
Keywords: criterion; system; systems linear; linear mappings ... See more keywords
Exponential Inequalities for Positive Linear Mappings
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DOI: 10.1155/2018/5467413
Abstract: In this article, we present exponential-type inequalities for positive linear mappings and Hilbert space operators, by means of convexity and the Mond-Pečarić method. The obtained results refine and generalize some known results. As an application,… read more here.
Keywords: exponential inequalities; inequalities positive; positive linear; linear mappings ... See more keywords