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4 papers
A Note on Parallel Distinguishability of two Quantum Operations
Chi-Kwong Li, Yue Liu, Chao Ma +1
We consider a homogeneous system of linear equations of the form arising from the distinguishability of two quantum operations by uses in parallel…
On Sign Pattern Matrices that Allow or Require Algebraic Positivity
Jean Leonardo Abagat, Diane Christine Pelejo
A square matrix with real entries is said to be algebraically positive (AP) if there exists a real polynomial such that all entries of the matrix . A square sign pa…
Minimum number of non-zero-entries in a stable matrix
Christopher Hambric, Chi-Kwong Li, Diane Christine Pelejo +1
We prove that if a matrix is potentially stable, then it has at least 11 non-zero entries. The results for matrix with up to 6 are known previously. We…
Minkowski product of convex sets and product numerical range
Chi-Kwong Li, Diane Christine Pelejo, Yiu-Tung Poon +1
Let be two compact convex sets in . Their Minkowski product is the set . We show that the set is star-shaped i…