Results 81 to 90 of about 21,050 (203)
Journal of Advances in Modeling Earth Systems, Volume 17, Issue 9, September 2025.Abstract Investigating the role of clouds and precipitation in the Earth system necessitates microphysical schemes capable of accurately describing the evolution of hydrometeor particle size distribution (PSD), while maintaining low computational costs implementable in atmospheric models.
Kang‐En Huang +3 more
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Stability of shifts, interpolation, and spectrum of atomic measures
Journal of the London Mathematical Society, Volume 112, Issue 3, September 2025.Abstract We ask which functions G$\mathcal {G}$ and separated sets Γ$\Gamma$ have the property that the Γ$\Gamma$‐shifts of G$\mathcal {G}$ form an unconditional basis in the Lp(R)$L^p({\mathbb {R}})$‐closure of their span for every p∈[1,∞]$p\in [1,\infty]$.
Alexander Ulanovskii, Ilya Zlotnikov
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International Journal of Mathematics and Mathematical Sciences, 2012 Almost orthogonal frames have been introduced and studied. It has been proved that a bounded almost orthogonal frame satisfies Feichtinger conjecture. Also, we prove that a bounded almost orthogonal frame contains a Riesz basis.
Virender, A. Zothansanga, S. K. Kaushik
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The Canadian Journal of Chemical Engineering, Volume 103, Issue 8, Page 3751-3766, August 2025.The boundary‐regulated distributed parameter system of an axial dispersion tubular reactor with delayed recycle is showcased, along with the optimal observer‐based control strategy developed using a late‐lumping method for its stabilization. Abstract The optimal control of an axial tubular reactor with a recycle stream is addressed as a key type of ...
Behrad Moadeli +2 more
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Characterizing the R-duality of g-frames
Journal of Inequalities and Applications, 2019 In this paper, we define the g-Riesz-dual of a given special operator-valued sequence with respect to g-orthonormal bases for a separable Hilbert space.
Liang Li, Pengtong Li
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Journal of Futures Markets, Volume 45, Issue 8, Page 917-945, August 2025.ABSTRACT This paper investigates the economic consequences for Bitcoin options' prices of a long memory in conditional volatility and conditional non‐normality of Bitcoin returns. The arbitrage‐free prices of Bitcoin options are determined by market consistent valuation and the conditional Esscher transform. Monte Carlo estimates for option prices from
Tak Kuen Siu
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Electronic Journal of Differential Equations, 2001 We find sufficient conditions for systems of functions to be Riesz bases in $L_2(0,1)$. Then we improve a theorem presented in [13] by showing that a ``standard'' system of solutions of a nonlinear boundary-value problem, normalized to 1, is a Riesz ...
Peter E. Zhidkov
doaj
Karpatsʹkì Matematičnì Publìkacìï, 2019 In this article we investigate a problem with nonlocal boundary conditions which are multipoint perturbations of mixed boundary conditions in the unit square $G$ using the Fourier method. The properties of a generalized transformation operator $R: L_2(G)
Ya.O. Baranetskij +3 more
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Mathematische Nachrichten, Volume 298, Issue 8, Page 2499-2546, August 2025.Abstract In this paper, the approximation of Dirac operators with general δ$\delta$‐shell potentials supported on C2$C^2$‐curves in R2$\mathbb {R}^2$ or C2$C^2$‐surfaces in R3$\mathbb {R}^3$, which may be bounded or unbounded, is studied. It is shown under suitable conditions on the weight of the δ$\delta$‐interaction that a family of Dirac operators ...
Jussi Behrndt +2 more
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Mathematical Methods in the Applied Sciences, Volume 48, Issue 12, Page 11592-11619, August 2025.ABSTRACT We consider evolution (nonstationary) space‐periodic solutions to the n$$ n $$‐dimensional nonlinear Navier–Stokes equations of anisotropic fluids with the viscosity coefficient tensor variable in space and time and satisfying the relaxed ellipticity condition.
Sergey E. Mikhailov
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