Results 171 to 180 of about 5,647,728 (213)

Partitioned RIS-Assisted Vehicular Secure Communication Based on Meta-Learning and Reinforcement Learning. [PDF]

Sensors (Basel)
Li H, Wang F, Qian J, Zhu P, Zhou A.
europepmc   +1 more source

Construction and hardware validation of a transition-aware quantum kernel for pre-hypotensive PPG and ECG. [PDF]

MethodsX
Darnapuk Y, Kravchenko P, Chuiko G.
europepmc   +1 more source

COVARIANCE LOSS, SZEMEREDI REGULARITY, AND DIFFERENTIAL PRIVACY. [PDF]

Proc Am Math Soc
Boedihardjo M, Strohmer T, Vershynin R.
europepmc   +1 more source

Bridging quantum noise and classical electrodynamics with stochastic methods. [PDF]

Nat Commun
Hitzelhammer F, Stowasser J, Hanschke L, Boos K, Sutter TC, Haider M, Jirauschek C, Müller K, Slavcheva G, Hohenester U.   +9 more
europepmc   +1 more source

A Novel Implementation of CCSD Analytic Gradients Using Cholesky Decomposition of the Two-Electron Integrals and Abelian Point-Group Symmetry. [PDF]

J Phys Chem A
Melega L, Nottoli T, Gauss J, Lipparini F.   +3 more
europepmc   +1 more source

Functions Operating on Positive Semidefinite Quaternionic Matrices

Monatshefte Fur Mathematik, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Helge Glöckner
exaly   +4 more sources

Singular Values of Differences of Positive Semidefinite Matrices [PDF]

SIAM Journal on Matrix Analysis and Applications, 2001
Let M n be the space of n × n complex matrices. For $A\in M_n,$ let $s(A)\equiv (s_1(A),\dotsc,\break s_n(A)),$ where $s_1(A)\ge\cdots\ge s_n(A)$ are the singular values of A. We prove that if $A,B\in M_n$ are positive semidefinite, then (i) $s_j(A-B)\le s_j(A\oplus B), j=1,2, . . .
Xingzhi Zhan
exaly   +5 more sources

On Positive Semidefinite Matrices With Known Null Space [PDF]

SIAM Journal on Matrix Analysis and Applications, 2002
We show how the zero structure of a basis of the null space of a positive semidefinite matrix can be exploited to determine a positive definite submatrix of maximal rank. We discuss consequences of this result for the solution of (constrained) linear systems and eigenvalue problems.
Zlatko Drmač, Peter Arbenz
exaly   +5 more sources

Singular Value and Norm Inequalities Associated With 2 x 2 Positive Semidefinite Block Matrices [PDF]

Electronic Journal of Linear Algebra, 2017
This paper aims to give singular value and norm inequalities associated with $2\times 2$ positive semidefinite block ...
Fuad Kittaneh, Aliaa Burqan
exaly   +2 more sources