Results 61 to 70 of about 15,510,191 (369)
Completely positive matrices and positivity of least squares solutions
Linear Algebra and its Applications, 1993 AbstractA sufficient condition for a doubly nonnegative matrix to be completely positive is given, in terms of the positivity of the least squares solution of a linear system associated to the matrix. Some known results on completely positive matrices are derived by this condition.
Paolo Zanardo, Luigi Salce
openaire +2 more sources
FoxO1 signaling in B cell malignancies and its therapeutic targeting
FEBS Letters, EarlyView.FoxO1 has context‐specific tumor suppressor or oncogenic character in myeloid and B cell malignancies. This includes tumor‐promoting properties such as stemness maintenance and DNA damage tolerance in acute leukemias, or regulation of cell proliferation and survival, or migration in mature B cell malignancies.
Krystof Hlavac +3 more
wiley +1 more source
, 2016 In this paper, we investigate the existence of at least three positive solutions to a singular boundary value problem of Caputo's fractional differential equations with a boundary condition involving values at infinite number of points.
Limin Guo, Lishan Liu, Yonghong Wu
semanticscholar +1 more source
Positive solutions for superdiffusive mixed problems
Applied Mathematics Letters, 2018 We study a semilinear parametric elliptic equation with superdiffusive reaction and mixed boundary conditions. Using variational methods, together with suitable truncation techniques, we prove a bifurcation-type theorem describing the nonexistence, existence and multiplicity of positive solutions.
Nikolaos S. Papageorgiou +3 more
openaire +3 more sources
FEBS Letters, EarlyView.Metabolic dysfunction‐associated steatotic liver disease (MASLD) affects nearly one‐third of the global population and poses a significant risk of progression to cirrhosis or liver cancer. Here, we discuss the roles of hepatic dendritic cell subtypes in MASLD, highlighting their distinct contributions to disease initiation and progression, and their ...
Camilla Klaimi +3 more
wiley +1 more source
EXISTENCE OF POSITIVE SOLUTIONS FOR AN ELASTIC CURVED BEAM EQUATION [PDF]
Scientific Bulletin of the ''Petru Maior" University of Tîrgu Mureș, 2017 This paper investigates the existence of positive solutions for a sixth-order differential equations. By using the Leggett-Williams fixed point theorem we give some new existence results.
Béla Kovacs
doaj
Positive solutions for singular $\phi-$Laplacian BVPs on the positive half-line
Electronic Journal of Qualitative Theory of Differential Equations, 2009 In this work, we are concerned with the existence of positive solutions for a $\phi$ Laplacian boundary value problem on the half-line. The results are proved using the fixed point index theory on cones of Banach spaces and the upper and lower solution ...
Smail Djebali, O. Saifi
doaj +1 more source
Constructing polynomial systems with many positive solutions using tropical geometry
, 2017 The number of positive solutions of a system of two polynomials in two variables defined in the field of real numbers with a total of five distinct monomials cannot exceed 15. All previously known examples have at most 5 positive solutions.
Hilany, Boulos El
core +1 more source
Positive solutions to boundary value problems of p-Laplacian with fractional derivative
Boundary Value Problems, 2017 In this article, we consider the following boundary value problem of nonlinear fractional differential equation with p-Laplacian operator: Dα(ϕp(Dαu(t)))=f(t,u(t ...
Xiaoyu Dong, Zhanbing Bai, Shuqin Zhang
semanticscholar +1 more source
Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia
FEBS Letters, EarlyView.This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley +1 more source