# Fingerprint Dive into the research topics where Ludmil Tomov Zikatanov is active. These topic labels come from the works of this person. Together they form a unique fingerprint.

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### Mathematics

Preconditioner

Discontinuous Galerkin

Discretization

Multigrid Method

Elliptic Problems

Algebraic multigrid Method

Subspace

Graph Laplacian

Two-level Method

Preconditioning

Galerkin Approximation

Interior Penalty

Linear Systems

Finite Element

Grid

Iteration

Linear Elasticity

Graph in graph theory

Convergence Rate

High-order Finite Elements

Multilevel Methods

Mesh

Finite Element Discretization

Multilevel Preconditioning

Rate of Convergence

Multilevel Preconditioners

Algebraic multigrid

Coarsening

Energy

Discontinuous Galerkin Method

Coefficient

Cycle

Poroelasticity

Piecewise Linear

Interpolate

Uniform convergence

Finite Element Approximation

Fourier Analysis

Mixed Finite Elements

Convergence Estimates

Estimate

Operator

Polyhedron

Bisection

Second-order Elliptic Problems

Best Approximation

Stokes Problem

Singular Systems

Convection-diffusion Equation

Approximation

### Engineering & Materials Science

Linear systems

Iterative methods

Coarsening

Consolidation

Finite element method

Fourier analysis

Agglomeration

Elasticity

Interpolation

Sobolev spaces

Polynomials

Mathematical operators

Partial differential equations

Factorization

Galerkin methods

Boundary value problems

Boundary conditions

Experiments

Decomposition

Anisotropy

Laplace equation

Poisson equation

Hilbert spaces

Two phase flow

Triangulation

Harmonic functions

Polynomial approximation

Helmholtz equation

Eigenvalues and eigenfunctions

Convergence of numerical methods

Advection

Maxwell equations

Poisson ratio

Vector spaces

Image segmentation

Error analysis

Free energy

Stiffness matrix

Electrostatics

Conservation

Mechanics

Computer systems

Hydrodynamics

Stabilization

Electrolytes

Electric fields