Chi-Kwong Li

activity

19962025

most citedCanonical forms, higher rank numerical range, convexity, totally isotropic subspace, matrix equations

84 citations · 657 across the 85 of their papers we have counts for

collaborators

Showing 2008Show all

2 papers · 1 filter

math.FA2008★ 4 cited

Quantum error correction and generalized numerical ranges

Chi-Kwong Li, Yiu-Tung Poon

For a noisy quantum channel, a quantum error correcting code exists if and only if the joint higher rank numerical ranges associated with the error operators of the channel is non-…

math.NA2008★ 4 cited

Least-Squares Approximation by Elements from Matrix Orbits Achieved by Gradient Flows on Compact Lie Groups

C. K. Li, Y. T. Poon, T. Schulte-Herbrueggen

Let $S (A)$ denote the orbit of a complex or real matrix $A$ under a certain equivalence relation such as unitary similarity, unitary equivalence, unitary congruences etc. Efficient…