293 citations · 793 across the 29 of their papers we have counts for
4 papers · 1 filter
Preconditioning of weighted H(div)-norm and applications to numerical simulation of highly heterogeneous media
Johannes Kraus, Raytcho Lazarov, Maria Lymbery +2
In this paper we propose and analyze a preconditioner for a system arising from a finite element approximation of second order elliptic problems describing processes in highly het-…
Two Schemes for Fractional Diffusion and Diffusion-Wave Equations with Nonsmooth Data
Bangti Jin, Raytcho Lazarov, Zhi Zhou
We consider the initial/boundary value problem for the fractional diffusion and diffusion-wave equations involving a Caputo fractional derivative in time. We develop two "simple" f…
An Analysis of the Rayleigh-Stokes problem for a Generalized Second-Grade Fluid
Emilia Bazhlekova, Bangti Jin, Raytcho Lazarov +1
We study the Rayleigh-Stokes problem for a generalized second-grade fluid which involves a Riemann-Liouville fractional derivative in time, and present an analysis of the problem i…
The Galerkin Finite Element Method for A Multi-term Time-Fractional Diffusion equation
Bangti Jin, Raytcho Lazarov, Yikan Liu +1
We consider the initial/boundary value problem for a diffusion equation involving multiple time-fractional derivatives on a bounded convex polyhedral domain. We analyze a space sem…