Results 81 to 90 of about 644 (117)

Commutators from a hyperplane of matrices

open access: yes, 2014
Denote by $M_n(K)$ the algebra of $n$ by $n$ matrices with entries in the field $K$. A theorem of Albert and Muckenhoupt states that every trace zero matrix of $M_n(K)$ can be expressed as $AB-BA$ for some pair $(A,B)$ of matrices of $M_n(K)$.
Pazzis, Clément de Seguins
core   +1 more source

The weighted Moore-Penrose inverse for sum of matrices

open access: yes, 2014
In this paper we exhibit that under the rank additivity condition r(A+ B) = r(A)+ r(B) , a neat relationship between the weighted Moore-Penrose inverse of A+B and the weighted Moore-Penrose inverses of A and B . Mathematics subject classification (2010):
Zhiping Xiong, Yingying Qin
semanticscholar   +1 more source

On best affine unbiased covariance-preserving prediction of factor scores [PDF]

open access: yes, 2004
This paper gives a generalization of results presented by ten Berge, Krijnen, Wansbeek & Shapiro. They examined procedures and results as proposed by Anderson & Rubin, McDonald, Green and Krijnen, Wansbeek & ten Berge.
Neudecker, Heinz
core   +2 more sources

Reverse order law for weighted Moore-Penrose inverses of multiple matrix products

open access: yes, 2014
In this paper by using some matrix rank theories, we derive equivalent conditions for reverse order law of weighted Moore-Penrose inverses of multiple matrix products.
Zhiping Xiong, Yingying Qin
semanticscholar   +1 more source

Circulating miR-146b and miR-27b are efficient biomarkers for early diagnosis of Equidae osteoarthritis. [PDF]

open access: yesSci Rep, 2023
Yassin AM   +5 more
europepmc   +1 more source

Weighted MP weak group inverse

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
To extent the notion of the MP weak group inverse for square matrices, we introduce the concept of the weighted MP weak group inverse for rectangular matrices.
Mosić Dijana, Marovt Janko
doaj   +1 more source

Weak MPCEP and *CEPMP inverses

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
We generalize the systems of equations, which introduced the MPCEP and *CEPMP inverses, using a minimal rank weak Drazin inverse and a minimal rank right weak Drazin inverse.
Mosić Dijana
doaj   +1 more source

Serotype-specific effectiveness against pneumococcal carriage and serotype replacement after ten-valent Pneumococcal Conjugate Vaccine (PCV10) introduction in Pakistan. [PDF]

open access: yesPLoS One, 2022
Nisar MI   +16 more
europepmc   +1 more source

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