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math.FA2025
Sharp perturbation bounds on the Frobenius norm of subunitary and positive polar factor
Teng Zhang, Zongben Xu
Leveraging tools from convex analysis and incorporating additional singular value information of matrices, we completely resolve the problem of establishing perturbation bounds for…
math.CO2025
Several combinatorial results generalized from one large subset of semigroups to infinitely many
Teng Zhang
In 2015, Phulara established a generalization of the famous central set theorem by an original idea. Roughly speaking, this idea extends a combinatorial result from one large subse…