Results 31 to 40 of about 721,371 (289)

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

Comptes 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, Zheng, Wenwen, Zhang, Xiaoli, Wei, Longhui, Tang, Kai, Zhao, Binxia, Li, Binglin   +6 more
doaj   +1 more source

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

Advances 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

International 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

The mixed problem in L^p for some two-dimensional Lipschitz domains [PDF]

, 2005
We consider the mixed problem for the Laplace operator in a class of Lipschitz graph domains in two dimensions with Lipschitz constant at most 1. The boundary of the domain is decomposed into two disjoint sets D and N.
A. Azzam, B.E.J. Dahlberg, B.E.J. Dahlberg, C.E. Kenig, C.E. Kenig, C.E. Kenig, D. Gilbarg, D.C. Chang, D.S. Jerison, D.S. Jerison, E.B. Fabes, E.M. Stein, G. Savaré, G.C. Verchota, G.M. Lieberman, J. Bergh, J. Lagnese, J.O. Strömberg, Loredana Lanzani, Luca Capogna, M.H. Protter, P. Grisvard, R.M. Brown, R.M. Brown, R.R. Coifman, R.R. Coifman, Russell M. Brown, S.R. Bell, Z. Shen   +28 more
core   +6 more sources

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

Axioms, 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

Kolmogorov inequalities for norms of Marchaud-type fractional derivatives of multivariate functions

Researches in Mathematics, 2020
We obtain new sharp Kolmogorov type inequalities, estimating the norm of mixed Marchaud type derivative of multivariate function through the C-norm of function itself and its norms in Hölder spaces.
N.V. Parfinovych, V.V. Pylypenko
doaj   +1 more source

Derivative Computations and Robust Standard Errors for Linear Mixed Effects Models in lme4 [PDF]

, 2017
While robust standard errors and related facilities are available in R for many types of statistical models, the facilities are notably lacking for models estimated via lme4.
Merkle, Edgar C., Wang, Ting
core   +3 more sources

A Solutions of the Linearized Two-Dimensional Generalized Dispersive Wave Equation with Mixed Derivative via the Residual Power Series Method

Jurnal Diferensial
This article applies the Residual Power Series Method (RPSM) to solve the Linearized Two-Dimensional Generalized Dispersive Wave Equation (L-2DGDWE) featuring the mixed derivative term $u_{xt}$.
Nawzad Hasan Ali
doaj   +1 more source

Carroll covariant scalar fields in two dimensions

Journal of High Energy Physics, 2023
Conformal Carroll symmetry generically arises on null manifolds and is important for holography of asymptotically flat spacetimes, generic black hole horizons and tensionless strings.
Arjun Bagchi, Aritra Banerjee, Sudipta Dutta, Kedar S. Kolekar, Punit Sharma   +4 more
doaj   +1 more source

Malliavin regularity of solutions to mixed stochastic differential equations

, 2013
For a mixed stochastic differential driven by independent fractional Brownian motions and Wiener processes, the existence and integrability of the Malliavin derivative of its solution are established.
Shalaiko, Taras, Shevchenko, Georgiy
core   +1 more source