Results 41 to 50 of about 8,913,878 (219)
Generalizing Conditional Average Treatment Effects From Nested Randomized Trials to Trial‐Eligible Individuals [PDF]
Stat MedABSTRACT Randomized controlled trials often enroll participants whose characteristics differ from those of a target population. When the distribution of effect modifiers differs between trial participants and the target population, treatment effects estimated within the trial may not be directly applicable to all trial‐eligible individuals.
Wen L, Dahabreh I, Chiu Y.
europepmc +2 more sources
On the Nonnegative Rank of Positive Operators
Mathematische Nachrichten, EarlyView.ABSTRACT In this paper, we introduce the concept of a nonnegative rank of a positive operator T:X→Y$T: X\rightarrow Y$ between ordered vector spaces. In the case of nonnegative matrices, our definition agrees with the standard definition of a nonnegative rank.
Roman Drnovšek, Marko Kandić
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Inverse problems for semilinear elliptic PDE with a general nonlinearity a(x,u)$a(x,u)$
Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.Abstract This article studies the inverse problem of recovering a nonlinearity in an elliptic equation Δu+a(x,u)=0$\Delta u + a(x,u) = 0$ from boundary measurements of solutions. Previous results based on first‐order linearization achieve this under a sign condition on ∂ua(x,u)$\partial _u a(x,u)$, and results based on higher order linearization ...
David Johansson +2 more
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Hydrological Processes, Volume 40, Issue 10, October 2026.Answering the great catchment hysteresis challenge, we derive a catchment closure whose memory kernel follows from counting flow pathways and measuring how long water is detained. Applied to four Cumbrian micro‐catchments, it shows that the observed hysteresis index conflates event retention with genuine memory, and separating them weakens the inferred
Farrukh A. Chishtie
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On the Riesz potential in Morrey spaces, associated with the Laplace-Bessel differential operator
, 2008 We consider the generalized shift operator, associated with the Laplace-Bessel differential operator Delta(B) = Sigma(n)(i=1) (partial derivative(2)/partial derivative x(i)(2)) + (gamma/x(n)) (partial derivative(2)/partial derivative x(n)).
Zeren, Yusuf
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On the representation of the Radon-Kipriyanov transform by the Riesz potential
Современная математика: Фундаментальные направленияIn this paper, a representation of the Radon-Kipriyanov transform by the classical Riesz potential is obtained. Based on the application of the Radon-Kipriyanov transform to a singular partial differential operator, a formula for transformation of a ...
L. N. Lyakhov +2 more
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Geometric spectral properties of electromagnetic waveguides
Journal of the London Mathematical Society, Volume 114, Issue 4, October 2026.Abstract We consider a homogeneous, isotropic electromagnetic waveguide with simply connected cross‐section embedded in a perfect conductor. We investigate the influence of geometric deformations, namely bending and twisting, on the real spectrum of the associated self‐adjoint Maxwell operator. We first establish sufficient conditions on the asymptotic
Philippe Briet +3 more
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Mathematical Methods in the Applied Sciences, Volume 49, Issue 13, Page 14964-15009, 15 September 2026.ABSTRACT We develop a unified mathematical framework extending classical moment theory from discrete integer orders to a continuous spectrum of real orders f>0$$ f>0 $$, providing a systematic statistical characterization of complex systems exhibiting power‐law behavior.
Farrukh A. Chishtie
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On the Riesz Potential and Its Commutators on Generalized Orlicz-Morrey Spaces
Journal of Function Spaces, 2014 We consider generalized Orlicz-Morrey spaces MΦ,φ(ℝn) including their weak versions WMΦ,φ(ℝn). In these spaces we prove the boundedness of the Riesz potential from MΦ,φ1(ℝn) to MΨ,φ2(ℝn) and from MΦ,φ1(ℝn) to WMΨ,φ2(ℝn). As applications of those results,
Vagif S. Guliyev, Fatih Deringoz
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Numerical Methods for Partial Differential Equations, Volume 42, Issue 5, September 2026.ABSTRACT In this work, we present an extension of the semi‐discrete Lagrangian‐Eulerian numerical scheme for diffusive‐dispersive conservation law problems, including a jump discontinuous flux function. As in the one‐dimensional scalar hyperbolic case, the no‐flow curves also organize the geometry of the method.
Eduardo Abreu +2 more
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