Abstract

It is well known that the analytic solution to a D-optimal design problem is not always easy to obtain apart from some simple cases, but computational procedures leading to approximate solutions are available. In the discussion of a paper by Wynn on a procedure of construction of asymptotic D-optimal designs, Silvey posed the question of whether the procedure will always converge on a finite set of points. The author answers Silvey's question by providing a counter-example which shows that Wynn's procedure sometimes converges on an infinite set of points.

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