Some comments of Wolfe's `away step'
Mathematical Programming: Series A and B
Trust-region methods
On cones of nonnegative quadratic functions
Mathematics of Operations Research
Convex Optimization
Computation of Minimum-Volume Covering Ellipsoids
Operations Research
Optimization Methods & Software
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We study a first-order method to find the minimum cross-sectional area ellipsoidal cylinder containing a finite set of points. This problem arises in optimal design in statistics when one is interested in a subset of the parameters. We provide convex formulations of this problem and its dual, and analyze a method based on the Frank-Wolfe algorithm for their solution. Under suitable conditions on the behavior of the method, we establish global and local convergence properties. However, difficulties may arise when a certain submatrix loses rank, and we describe a technique for dealing with this situation.