Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5773351 | Linear Algebra and its Applications | 2017 | 12 Pages |
Abstract
Positivity properties of the Hadamard powers of the matrix [1+xixj] for distinct positive real numbers x1,â¦,xn and the matrix [|cosâ¡((iâj)Ï/n)|] are studied. In particular, it is shown that the nÃn matrix [(1+xixj)r] is positive semidefinite if and only if r is a nonnegative integer or r>nâ2, and for every odd integer nâ¥3 the nÃn matrix [|cosâ¡((iâj)Ï/n)|r] is positive semidefinite if and only if r is a nonnegative even integer or r>nâ3.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Tanvi Jain,