Journal of Inequalities and Applications ( IF 1.470 ) Pub Date : 2020-11-19 , DOI: 10.1186/s13660-020-02514-6
Xiaoying Zhou

In this article, we show unitarily invariant norm inequalities for sector $2\times 2$ block matrices which extend and refine some recent results of Bourahli, Hirzallah, and Kittaneh (Positivity, 2020, https://doi.org/10.1007/s11117-020-00770-w ).

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