J. William Helton - researchr alias

researchr

You are not signed in
Sign in
Sign up

Viewing Publication 1 - 39 from 39

2024

Matrix extreme points and free extreme points of free spectrahedraAidan Epperly, Eric Evert, J. William Helton, Igor Klep. oms, 39(6):1263-1308, November 2024. [doi]

Relaxations and Exact Solutions to Quantum Max Cut via the Algebraic Structure of Swap OperatorsAdam Bene Watts, Anirban Chowdhury, Aidan Epperly, J. William Helton, Igor Klep. quantum, 8:1352, 2024. [doi]

2023

Empirical Properties of Optima in Free Semidefinite ProgramsEric Evert, Yi Fu, J. William Helton, John Yin. em, 32(3):477-501, July 2023. [doi]

2021

Noncommutative Polynomials Describing Convex SetsJ. William Helton, Igor Klep, Scott A. McCullough, Jurij Volcic. focm, 21(2):575-611, 2021. [doi]

2013

2 Commuting VariablesHarry Dym, J. William Helton, Caleb Meier. ijac, 23(7):1685-1754, 2013. [doi]

The matricial relaxation of a linear matrix inequalityJ. William Helton, Igor Klep, Scott A. McCullough. mp, 138(1-2):401-445, 2013. [doi]

2012

A Semidefinite Approach for Truncated K-Moment ProblemsJ. William Helton, Jiawang Nie. focm, 12(6):851-881, 2012. [doi]

2010

2009

Determinant Expansions of Signed Matrices and of Certain JacobiansJ. William Helton, Igor Klep, Raul Gomez. siammax, 31(2):732-754, 2009. [doi]

Convex Matrix Inequalities Versus Linear Matrix InequalitiesJ. William Helton, Scott A. McCullough, Mihai Putinar, Victor Vinnikov. tac, 54(5):952-964, 2009. [doi]

Sufficient and Necessary Conditions for Semidefinite Representability of Convex Hulls and SetsJ. William Helton, Jiawang Nie. siamjo, 20(2):759-791, 2009. [doi]

2008

Conditions for a massless plasma analysis to predict stabilization of the tokamak plasma vertical instabilityJ. William Helton, Kevin J. McGown, M. L. Walker. cdc 2008: 3761-3768 [doi]

Structured semidefinite representation of some convex setsJ. William Helton, Jiawang Nie. cdc 2008: 4797-4800 [doi]

2006

Solving Matrix Inequalities whose Unknowns are MatricesJuan F. Camino, J. William Helton, Robert E. Skelton. siamjo, 17(1):1-36, 2006. [doi]

A Symbolic Procedure for Computing Semidefinite Program DualsMaurício C. de Oliveira, J. William Helton. cdc 2006: 5192-5197 [doi]

2005

∞ control of discrete-time systemsJ. William Helton, Matthew R. James, William M. McEneaney. tac, 50(11):1808-1811, 2005. [doi]

2004

Solving matrix inequalities whose unknowns are matricesJuan F. Camino, J. William Helton, Robert E. Skelton. cdc 2006: 3160-3166 [doi]

Convex Noncommutative Polynomials Have Degree Two or LessJ. William Helton, Scott A. McCullough. siammax, 25(4):1124-1139, 2004. [doi]

2003

Computer algebra tailored to matrix inequalities in controlJ. William Helton, Maurício C. de Oliveira. cdc 2003: 4973-4978 [doi]

Global Uniqueness Tests and Performance Bounds for H:::infinity::: OptimaJ. William Helton, Marshall A. Whittlesey. siamco, 42(1):363-380, 2003. [doi]

Manipulating Matrix Inequalities AutomaticallyJ. William Helton. In Joachim Rosenthal, David S. Gilliam, editors, Mathematical Systems Theory in Biology, Communications, Computation, and Finance. pages 237-256, Springer, 2003. [doi]

2001

∞ control: practicality of implementing the cheap sensor caseJ. William Helton, Matthew R. James, William M. McEneaney. cdc 2001: 2746-2751 [doi]

Some adaptive control problems which convert to a "classical" problem in several complex variablesJ. William Helton. tac, 46(12):2038-2043, 2001. [doi]

An introduction to the mechanics of tensegrity structuresRobert E. Skelton, Rajesh Adhikari, Jean Paul Pinaud, Waileung Chan, J. William Helton. cdc 2001: 4254-4259 [doi]

2000

A symbolic algorithm for determining convexity of a matrix function: how to get Schur complements out of your lifeJuan F. Camino, J. William Helton, Robert E. Skelton. cdc 2000: 5023-5026 [doi]

∞ control problems with application to jet engine compressorsMichael Hardt, J. William Helton, Kenneth Kreutz-Delgado. tcst, 8(1):98-111, 2000. [doi]

∞ optimaJ. William Helton, Marshall A. Whittlesey. cdc 2000: 1043-1048 [doi]

1998

Computer simplification of formulas in linear systems theoryJ. William Helton, Mark Stankus, John J. Wavrik. tac, 43(3):302-314, 1998. [doi]

Dissipative control systems synthesis with full state feedbackS. Yuliar, Matthew R. James, J. William Helton. mcss, 11(4):335-356, 1998. [doi]

1994

Application of signal subspace algorithms to scattered geometric optics and edge-diffracted signalsMichael L. Walker 0004, J. William Helton. tsp, 42(9):2217-2226, 1994. [doi]

Sparsity Patterns with High Rank Extremal Positive Semidefinite MatricesJ. William Helton, Daniel Lam, Hugo J. Woerdeman. siammax, 15(1):299-312, January 1994. [doi]

1993

∞ control for nonlinear systems with output feedbackJoseph A. Ball, J. William Helton, Michael L. Walker 0004. tac, 38(4):546-559, 1993. [doi]

1992

∞ control theory for stable plantsJoseph A. Ball, J. William Helton. mcss, 5(3):233-261, 1992. [doi]

1988

Correction: Vandermonde and Resultant Matrices: An Abstract ApproachJ. William Helton, Leiba Rodman. mst, 21(1):61, 1988.

1987

Vandermonde and Resultant Matrices: An Abstract ApproachJ. William Helton, Leiba Rodman. mst, 20(2-3):169-192, 1987.

1974

Scattering theory and non linear systemsF. Joanne Helton, J. William Helton. category 1975: 164-169

Sign in or sign up to see more results.

runs on WebDSL