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20202022
most citedBest approximations, distance formulas and orthogonality in C*-algebras

6 citations · 8 across the 3 of their papers we have counts for

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math.FA2022

Subdifferential of the joint numerical radius

Priyanka Grover, Sushil Singla

An expression for the subdifferential of the joint numerical radius is obtained. Its applications to the best approximation problems in the joint numerical radius are discussed.

math.FA2020

Gateaux derivative of C* norm

Sushil Singla

We find an expression for Gateaux derivative of the -algebra norm. This gives us alternative proofs or generalizations of various known results on the closely related notions…