J. William Helton

According to our database, J. William Helton authored at least 38 papers between 1974 and 2023.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of two.

2023

Empirical Properties of Optima in Free Semidefinite Programs.

Eric Evert, Yi Fu, J. William Helton, John Yin

Exp. Math., July, 2023

2021

Noncommutative Polynomials Describing Convex Sets.

J. William Helton, Igor Klep, Scott A. McCullough, Jurij Volcic

Found. Comput. Math., 2021

2020

3XOR Games with Perfect Commuting Operator Strategies Have Perfect Tensor Product Strategies and are Decidable in Polynomial Time.

Adam Bene Watts, J. William Helton

CoRR, 2020

2013

The matricial relaxation of a linear matrix inequality.

J. William Helton, Igor Klep, Scott A. McCullough

Math. Program., 2013

Non-Commutative Representations of families of K² Commutative polynomials in 2K² Commuting Variables.

Harry Dym, J. William Helton, Caleb Meier

Int. J. Algebra Comput., 2013

2012

A Semidefinite Approach for Truncated K-Moment Problems.

J. William Helton, Jiawang Nie

Found. Comput. Math., 2012

2010

Semidefinite representation of convex sets.

J. William Helton, Jiawang Nie

Math. Program., 2010

Conditions for stabilization of the tokamak plasma vertical instability using only a massless plasma analysis.

J. William Helton, Kevin J. McGown, Michael L. Walker

Autom., 2010

Solvability of linear matrix equations in a symmetric matrix variable.

Maurício C. de Oliveira, J. William Helton

Proceedings of the 49th IEEE Conference on Decision and Control, 2010

Relaxing LMI domination matricially.

J. William Helton, Igor Klep, Scott A. McCullough

Proceedings of the 49th IEEE Conference on Decision and Control, 2010

2009

Convex Matrix Inequalities Versus Linear Matrix Inequalities.

J. William Helton, Scott A. McCullough, Mihai Putinar, Victor Vinnikov

IEEE Trans. Autom. Control., 2009

Determinant Expansions of Signed Matrices and of Certain Jacobians.

J. William Helton, Igor Klep, Raul Gomez

SIAM J. Matrix Anal. Appl., 2009

Sufficient and Necessary Conditions for Semidefinite Representability of Convex Hulls and Sets.

J. William Helton, Jiawang Nie

SIAM J. Optim., 2009

2008

Structured semidefinite representation of some convex sets.

J. William Helton, Jiawang Nie

Proceedings of the 47th IEEE Conference on Decision and Control, 2008

Conditions for a massless plasma analysis to predict stabilization of the tokamak plasma vertical instability.

J. William Helton, Kevin J. McGown, Michael L. Walker

Proceedings of the 47th IEEE Conference on Decision and Control, 2008

2006

Solving Matrix Inequalities whose Unknowns are Matrices.

Juan F. Camino, J. William Helton, Robert E. Skelton

SIAM J. Optim., 2006

A Symbolic Procedure for Computing Semidefinite Program Duals.

Maurício C. de Oliveira, J. William Helton

Proceedings of the 45th IEEE Conference on Decision and Control, 2006

2005

Reduced-complexity nonlinear H^∞ control of discrete-time systems.

J. William Helton, Matthew R. James, William M. McEneaney

IEEE Trans. Autom. Control., 2005

2004

Convex Noncommutative Polynomials Have Degree Two or Less.

J. William Helton, Scott A. McCullough

SIAM J. Matrix Anal. Appl., 2004

2003

Global Uniqueness Tests and Performance Bounds for H^infinity Optima.

J. William Helton, Marshall A. Whittlesey

SIAM J. Control. Optim., 2003

Asymptotics of Permutations with Nearly Periodic Patterns of Rises and Falls.

Edward A. Bender, J. William Helton, L. Bruce Richmond

Electron. J. Comb., 2003

Computer algebra tailored to matrix inequalities in control.

J. William Helton, Maurício C. de Oliveira

Proceedings of the 42nd IEEE Conference on Decision and Control, 2003

Manipulating Matrix Inequalities Automatically.

J. William Helton

Proceedings of the Mathematical Systems Theory in Biology, 2003

2001

Some adaptive control problems which convert to a "classical" problem in several complex variables.

J. William Helton

IEEE Trans. Autom. Control., 2001

An introduction to the mechanics of tensegrity structures.

Robert E. Skelton, Rajesh Adhikari, Jean Paul Pinaud, Waileung Chan, J. William Helton

Proceedings of the 40th IEEE Conference on Decision and Control, 2001

Nonlinear H_∞ control: practicality of implementing the cheap sensor case.

J. William Helton, Matthew R. James, William M. McEneaney

Proceedings of the 40th IEEE Conference on Decision and Control, 2001

2000

Numerical solution of nonlinear 𝒽₂ and 𝒽_∞ control problems with application to jet engine compressors.

Michael Hardt, J. William Helton, Kenneth Kreutz-Delgado

IEEE Trans. Control. Syst. Technol., 2000

Global uniqueness tests for H^∞ optima.

J. William Helton, Marshall A. Whittlesey

Proceedings of the 39th IEEE Conference on Decision and Control, 2000

A symbolic algorithm for determining convexity of a matrix function: how to get Schur complements out of your life.

Juan F. Camino, J. William Helton, Robert E. Skelton

Proceedings of the 39th IEEE Conference on Decision and Control, 2000

1998

Computer simplification of formulas in linear systems theory.

J. William Helton, Mark Stankus, John J. Wavrik

IEEE Trans. Autom. Control., 1998

Dissipative control systems synthesis with full state feedback.

S. Yuliar, Matthew R. James, J. William Helton

Math. Control. Signals Syst., 1998

1994

Sparsity Patterns with High Rank Extremal Positive Semidefinite Matrices.

J. William Helton, Daniel Lam, Hugo J. Woerdeman

SIAM J. Matrix Anal. Appl., January, 1994

Application of signal subspace algorithms to scattered geometric optics and edge-diffracted signals.

Michael L. Walker, J. William Helton

IEEE Trans. Signal Process., 1994

1993

H^∞ control for nonlinear systems with output feedback.

Joseph A. Ball, J. William Helton, Michael L. Walker

IEEE Trans. Autom. Control., 1993

1992

Nonlinear<i>H</i>^∞ control theory for stable plants.

Joseph A. Ball, J. William Helton

Math. Control. Signals Syst., 1992

1988

Correction: Vandermonde and Resultant Matrices: An Abstract Approach.

J. William Helton, Leiba Rodman

Math. Syst. Theory, 1988

1987

Vandermonde and Resultant Matrices: An Abstract Approach.

J. William Helton, Leiba Rodman

Math. Syst. Theory, 1987

1974

Scattering theory and non linear systems.

F. Joanne Helton, J. William Helton

Proceedings of the Category Theory Applied to Computation and Control, 1974