Results 21 to 30 of about 2,457,267 (238)

Cauchy problem for the hyperbolic system with mixed derivative

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2012
Cauchy problem for the hyperbolic system with mixed derivative is considered. The given system is transformed to the triangular or diagonal form for the further equations separation.
E. A. Kozlova
doaj   +1 more source

A Compact Numerical Scheme for the Heat Transfer of Mixed Convection Flow in Quantum Calculus

open access: yesApplied Sciences, 2022
This contribution aims to propose a compact numerical scheme to solve partial differential equations (PDEs) with q-spatial derivative terms. The numerical scheme is based on the q-Taylor series approach, and an operator is proposed, which is useful to ...
Yasir Nawaz   +2 more
doaj   +1 more source

Classical solution of the initial-boundary value problem for the wave equation with mixed derivative

open access: yesСовременная математика: Фундаментальные направления
In this paper, we study the initial-boundary value problem for a second-order nonhomogeneous hyperbolic equation in a half-strip of the plane with constant coefficients, containing a mixed derivative, with zero and nonzero potentials.
V. S. Rykhlov
doaj   +1 more source

Effective synthesis of menthol derivative monomenthyl succinate catalyzed by nanoscale silicon dioxide immobilized DMAP derivative in mixed solvent system

open access: yesComptes Rendus. Chimie, 2020
For the preparation of an immobilized DMAP derivative, 4-dimethyl-aminopyridine (DMAP) is covalently bonded to the surface of nanoscale silicon dioxide by N-alkylation.
Qi, Xinyu   +6 more
doaj   +1 more source

On estimates of M-term approximations of the Sobolev class in the Lorentz space

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы
In the paper spaces of periodic functions of several variables were considered, namely the Lorentz space L2,τ(Tm), the class of functions with bounded mixed fractional derivative Wr2,τ, 1 ≤ τ < ∞, and the order of the best M-term approximation of a ...
Г. Акишев   +1 more
doaj   +1 more source

An expanded mixed finite element simulation for two-sided time-dependent fractional diffusion problem

open access: yesAdvances in Difference Equations, 2018
In this paper, we consider a time-dependent diffusion problem with two-sided Riemann-Liouville fractional derivatives. By introducing a fractional-order flux as auxiliary variable, we establish the saddle-point variational formulation, based on which we ...
Qiong Yuan, Huanzhen Chen
doaj   +1 more source

The Fractional Step Method versus the Radial Basis Functions for Option Pricing with Correlated Stochastic Processes

open access: yesInternational Journal of Financial Studies, 2020
In option pricing models with correlated stochastic processes, an option premium is commonly a solution to a partial differential equation (PDE) with mixed derivatives in more than two space dimensions.
Yusho Kagraoka
doaj   +1 more source

On the adaptive selection of the parameter in stabilized finite element approximations [PDF]

open access: yes, 2013
A systematic approach is developed for the selection of the stabilization parameter for stabilized finite element approximation of the Stokes problem, whereby the parameter is chosen to minimize a computable upper bound for the error in the approximation.
Rankin, Richard Andrew Robert   +3 more
core   +4 more sources

Interior Regularity Estimates for a Degenerate Elliptic Equation with Mixed Boundary Conditions

open access: yesAxioms, 2018
The Marchaud fractional derivative can be obtained as a Dirichlet-to–Neumann map via an extension problem to the upper half space. In this paper we prove interior Schauder regularity estimates for a degenerate elliptic equation with mixed Dirichlet ...
Jean-Daniel Djida, Arran Fernandez
doaj   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider   +15 more
wiley   +1 more source

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