"Steplength Selection in Interior-Point Methods"
F. Curtis, J. Nocedal
Applied Math Letters, Volume 20, Issue 5, Pages 516-523 (2007).

We present a new strategy for choosing primal and dual steplengths in a primal-dual interior-point algorithm for convex quadratic programming. Current implementations often scale steps equally to avoid increases in dual infeasibility between iterations. We propose that this method can be too conservative, while safeguarding an unequally-scaled steplength approach will often require fewer steps toward to a solution. Computational results are given.
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