Concepedia

Gregory Ammar

GA

19

Publications

891

Citations

16

H-Index

1986

Active since

Affiliations

Northern Illinois University(Current)

Kent State University

Chemnitz University of Technology

Naval Postgraduate School

University of Kentucky

Gregory Ammar is an author at Northern Illinois University specializing in engineering, approximation theory, and numerical analysis.

Top concepts

EngineeringNumerical AnalysisApproximation TheorySpectral TheorySignal ProcessingRepresentation TheoryInverse ProblemsMathematical ProgrammingStabilityComputer Science

Publications per year

1986–2001

19

Publications

19

Superfast Solution of Real Positive Definite Toeplitz Systems

Gregory Ammar, William B. Gragg · SIAM Journal on Matrix Analysis and Applications · 1988 · 260 citations

Discrete least squares approximation by trigonometric polynomials

Lothar Reichel, Gregory Ammar, William B. Gragg · Mathematics of Computation · 1991 · 74 citations · Full text

On Hamiltonian and symplectic Hessenberg forms

Gregory Ammar, Volker Mehrmann · Linear Algebra and its Applications · 1991 · 60 citations

Symplectic Hessenberg Forms, Hamiltonian Theory, Representation Theory +1

On the eigenproblem for orthogonal matrices

Gregory Ammar, William B. Gragg, Lothar Reichel · 1986 · 59 citations

Spectral Theory, Numerical Analysis, Stable Method +12

A Variant of the Gohberg–Semencul Formula Involving Circulant Matrices

Gregory Ammar, Paul Gader · SIAM Journal on Matrix Analysis and Applications · 1991 · 55 citations

Modified Formula, Matrix Method, Matrix Theory +2

Rows per page

1–5 of 19