50 citations · 234 across the 24 of their papers we have counts for
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The Switch Point Algorithm
Mahya Aghaee, William W. Hager
The Switch Point Algorithm is a new approach for solving optimal control problems whose solutions are either singular or bang-bang or both singular and bang-bang, and which possess…
A Newton-Type Active Set Method for Nonlinear Optimization with Polyhedral Constraints
William W. Hager, Davoud Ataee Tarzanagh
A Newton-type active set algorithm for large-scale minimization subject to polyhedral constraints is proposed. The algorithm consists of a gradient projection step, a second-order…
An Inexact Accelerated Stochastic ADMM for Separable Convex Optimization
Jianchao Bai, William W. Hager, Hongchao Zhang
An inexact accelerated stochastic Alternating Direction Method of Multipliers (AS-ADMM) scheme is developed for solving structured separable convex optimization problems with linea…
Solving Singular Control Problems in Mathematical Biology, Using PASA
Summer Atkins, Mahya Aghaee, Maia Martcheva +1
In this paper, we will demonstrate how to use a nonlinear polyhedral constrained optimization solver called the Polyhedral Active Set Algorithm (PASA) for solving a general singula…
Mesh Refinement Method for Solving Optimal Control Problems with Nonsmooth Solutions Using Jump Function Approximations
Alexander T. Miller, WIlliam W. Hager, Anil V. Rao
A mesh refinement method is described for solving optimal control problems using Legendre-Gauss-Radau collocation. The method detects discontinuities in the control solution by emp…
Convergence rates for an inexact ADMM applied to separable convex optimization
William W. Hager, Hongchao Zhang
Convergence rates are established for an inexact accelerated alternating direction method of multipliers (I-ADMM) for general separable convex optimization with a linear constraint…