Results 141 to 150 of about 7,558 (300)
"Maximum Covariance Di erence Test for Equality of Two Covariance Matrices" [PDF]
We propose a test of equality of two covariance matrices based on the maximum standardized di erence of scalar covariances of two sample covariance matrices.We derive the tail probability of the asymptotic null distribution of the test statistic by the ...
Akimichi Takemura, Satoshi Kuriki
core
Journal of Microscopy, EarlyView.Abstract Grain identification in polycrystalline nanoparticles, for example, determining which crystal phases are present at each spatial location, is fundamental to materials characterisation. This is particularly challenging when grains overlap extensively, as commonly occurs in four‐dimensional scanning transmission electron microscopy (4D‐STEM ...
Wei Liu +5 more
wiley +1 more source
Spectral Radius of Nonnegative Centrosymmetric Matrices
, 2011 In this paper, we present some results about the spectral radius of a kind of structured matrices, nonnegative centrosymmetric matrices. Furthermore, we constructrue a algorithm to compute the spectral radius of nonnegative centrosymmetric ...
Hongyi, LI
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Detecting Informed Trading Risk from Undercutting Activity
The Journal of Finance, EarlyView.ABSTRACT We introduce a simple measure of informed trading risk, QIDres$QID^{res}$, the residual to liquidity quote‐improvement‐to‐deterioration ratio times −1$-1$. When facing with increased informed trading risk, liquidity providers compete less to provide liquidity, reducing their undercutting activity. Reductions in undercutting leave footprints in
YASHAR H. BARARDEHI +2 more
wiley +1 more source
Some inequalities for sums of nonnegative definite matrices in quaternions
Journal of Inequalities and Applications, 2005 Some matrix versions of the Cauchy-Schwarz and Frucht-Kantorovich inequalities are established over the quaternionic algebra. As applications, a group of inequalities for sums of Hermitian nonnegative definite matrices over the quaternionic algebra are ...
Styan George PH, Tian Yongge
doaj
Decomposition of nonnegative group-monotone matrices
, 1980 A decomposition of nonnegative matrices with nonnegative group inverses has been obtained. This decomposition provides a new approach to the solution of problems relating to nonnegative matrices with nonnegative group inverses. As a consequence, a number
V. K. Goel, Edward K. Kwak, S. K. Jain
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The Mixed Gamble of Competitive Dynamics in Family‐Controlled Firms
Journal of Management Studies, EarlyView.Abstract We extend the mixed gamble perspective to explain how family‐controlled firms frame and evaluate the difficult trade‐off between potential gains and losses in financial wealth (FW) and socioemotional wealth (SEW) when pursuing portfolio‐level strategic initiatives, as captured by competitive aggressiveness and complexity.
Jaeyoung Cho +2 more
wiley +1 more source
Nonnegative idempotent matrices
, 1974 Elementary ideas in the theory of partially ordered linear algebras are used to describe the structure of nonnegative idempotent matrices. In particular, we obtain a kind of “spectral decomposition” theorem for such matrices.
Ralph DeMarr
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Regular nonnegative matrices [PDF]
Proceedings of the American Mathematical Society, 1973 openaire +2 more sources
Journal of Time Series Analysis, EarlyView.ABSTRACT We propose a new formulation of the Vašičekmodel within the framework of functional data analysis. We treat observations (continuous‐time rates) within a suitably defined trading day as a single statistical object. We then consider a sequence of such objects, indexed by day.
Piotr Kokoszka +4 more
wiley +1 more source