Sturm, Jos F.Overview
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Most widely held works by
Jos F Sturm
Primaldual interior point approach to semidefinite programming
by Jos F Sturm
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Book
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2 editions published in 1997 in English and held by 14 WorldCat member libraries worldwide
New complexity results for the IriImai method
by Jos F Sturm
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Book
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4 editions published between 1993 and 1996 in English and held by 10 WorldCat member libraries worldwide
Analytic central path, sensitivity analysis and parametric linear programming
by A. G Holder
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Book
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5 editions published between 1997 and 1998 in English and held by 9 WorldCat member libraries worldwide In this paper we consider properties of the central path and the analytic center of the optimal face in the context of parametric linear programming. We first show that if the righthand side vector of a standard linear program is perturbed, then the analytic center of the optimal face is oneside differentiable with respect to the perturbation parameter. In that case we also show that the whole analytic central path shifts in a uniform fashion. When the objective vector is perturbed, we show that the last part of the analytic central path is tangent to a central path defined on the optimal face of the original problem
On sensitivity of central solutions in semidefinite programming
by Jos F Sturm
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Book
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3 editions published in 1998 in English and held by 9 WorldCat member libraries worldwide
Polynomial primaldual cone affine scaling for semidefinite programming
by A. B Berkelaar
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Book
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4 editions published between 1996 and 1997 in English and held by 9 WorldCat member libraries worldwide In this paper we generalize the primaldual cone affine scaling algorithm of Sturm and Zhang to semidefinite programming. We show in this paper that the underlying ideas of the cone affine scaling algorithm can be naturely applied to semidefinite programming, resulting in a new algorithm. Compared to other primaldual affine scaling algorithms for semidefinite programming, our algorithm enjoys the lowest computational complexity
Symmetric primaldual path following algorithms for semidefinite programming
by Jos F Sturm
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Book
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5 editions published between 1995 and 1996 in English and held by 7 WorldCat member libraries worldwide In this paper a symmetric primaldual transformation for positive semidefinite programming is proposed. For standard SDP problems, after this symmetric transformation the primal variables and the dual slacks become identical. In the context of linear programming, existence of such a primaldual transformation is a well known fact. Based on this symmetric primaldual transformation we derive Newton search directions for primaldual pathfollowing algorithms for semidefinite programming. In particular, we generalize: (1) the short step path following algorithm, (2) the predictorcorrector algorithm and (3) the largest step algorithm to semidefinite programming. It is shown that these algorithms require at most ${\cal O}(\sqrt{n}\mid \log \epsilon \mid ) $ main iterations for computing an $\epsilon $optimal solution
An interior point method, based on rankone updates, for linear programming
by Jos F Sturm
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Book
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4 editions published in 1995 in English and held by 7 WorldCat member libraries worldwide We propose a polynomial time primaldual potential reduction algorithm for linear programming. Unlike any other interior point method, the new algorithm is based on a rankone updating scheme for sequentially computing the projection matrices. For a standard linear programming problem, the number of operations required is ${\cal O}(mn)$ per main iteration and the overall computational complexity is ${\cal O}(mn^{2.5}L)$
A potential reduction method for harmonically convex programming
by Jos F Sturm
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Book
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2 editions published in 1993 in English and held by 7 WorldCat member libraries worldwide
Superlinear convergence of a symmetric primaldual path following algorithm for semidefinite programming
by ZhiQuan Luo
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Book
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4 editions published in 1996 in English and held by 7 WorldCat member libraries worldwide This paper establishes the superlinear convergence of a symmetric primaldual path following algorithm for semidefinite programming under the assumptions that the semidefinite program has a strictly complementary primaldual optimal solution and that the size of the central path neighborhood tends to zero. The interior point algorithm considered here closely resembles the MizunoToddYe predictorcorrector method for linear programming which is known to be quadratically convergent. It is shown that when the iterates are well centered, the duality gap is reduced superlinearly after each predictor step. Indeed, if each predictor step is succeeded by $r$ consecutive corrector steps then the predictor reduces the duality gap superlinearly with order $\frac{2}{1+2^{2r}}$. The proof relies on a careful analysis of the central path for semidefinite programming. It is shown that under the strict complementarity assumption, the primaldual central path converges to the analytic center of the primaldual optimal solution set, and the distance from any point on the central path to this analytic center is bounded by the duality gap
Duality and selfduality for conic convex programming
by ZhiQuan Luo
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Book
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4 editions published in 1996 in English and held by 7 WorldCat member libraries worldwide This paper considers the problem of minimizing a linear function over the intersection of an affine space with a closed convex cone. In the first half of the paper, we give a detailed study of duality properties of this problem and present examples to illustrate these properties. In particular, we introduce the notions of weak/strong feasibility or infeasibility for a general primaldual pair of conic convex programs, and then establish various relations between these notions and the duality properties of the problem. In the second half of the paper, we propose a selfdual embedding with the following properties: Any weakly centered sequence converging to a complementary pair either induces a sequence converging to a certificate of strong infeasibility, or induces a sequence of primaldual pairs for which the amount of constraint violation converges to zero, and the corresponding objective values are in the limit not worse than the optimal objective value(s). In case of strong duality, these objective values in fact converge to the optimal value of the original problem. When the problem is neither strongly infeasible nor endowed with a complementary pair, we completely specify the asymptotic behavior of an indicator in relation to the status of the original problem, namely whether the problem (1) is weakly infeasible, (2) is feasible but with a positive duality gap, (3) has no duality gap nor complementary solution pair
On a wide region of centers and primaldual interior point algorithms for linear programming
by Jos F Sturm
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Book
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4 editions published in 1995 in English and held by 7 WorldCat member libraries worldwide In the adaptive step primaldual interior point method for linear programming, polynomial algorithms are obtained by computing Newton directions towards targets on the central path, and restricting the iterates to a neighborhood of this central path. In this paper, the adaptive step methodology is extended, by considering targets in a certain central {\em region}, which contains the usual central path, and subsequently generating iterates in a neighborhood of this region. The size of the central region can vary from the central path to the whole feasible region by choosing a certain parameter. An \( {\cal O}( \sqrt{ n} L) \) iteration bound is obtained under very mild conditions on the choice of the target points. In particular, we leave plenty of room for experimentation with search directions. The practical performance of the new primaldual interior point method is measured on the Netlib test set for various sizes of the central region
An interior point subgradient method for linearly constrained nondifferentiable convex programming
by Hans Frenk
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Book
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5 editions published in 1996 in English and held by 7 WorldCat member libraries worldwide We propose in this paper an algorithm for solving linearly constrained nondifferentiable convex programming problems. This algorithm combines the ideas of the affine scaling method with the subgradient method. It is a generalization of the dual and interior point method for minmax problems proposed by Sturm and Zhang \cite{SZ95}. In the new method, the search direction is obtained by projecting in a scaled space a subgradient of the objective function with a logarithmic barrier term. The stepsize choice is analogous to the stepsize choice in the usual subgradient method. Convergence of the method is established
On weighted centers for semidefinitive programming
by Jos F Sturm
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Book
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4 editions published in 1996 in English and held by 7 WorldCat member libraries worldwide In this paper, we generalize the notion of weighted centers to semidefinite programming. Our analysis fits in the vspace framework, which is purely based on the symmetric primaldual transformation and does not make use of barriers. Existence and scale invariance properties are proven for the weighted centers. Relations with other primaldual maps are discussed
A dual and interior point approach to solve convex minmax problems
by Jos F Sturm
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Book
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4 editions published in 1995 in English and held by 7 WorldCat member libraries worldwide
Superlinear convergence of an algorithm for monotone linear complementarity problems, when no strictly complementary solution exists
by Jos F Sturm
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Book
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4 editions published in 1996 in English and held by 7 WorldCat member libraries worldwide A new predictorcorrector interior point algorithm for solving monotone linear complementarity problems (LCP) is proposed, and it is shown to be superlinearly convergent with at least order 1.5, even if the LCP has no strictly complementary solution. Unlike Mizuno's recent algorithm (Mizuno, 1996), the fast local convergence is attained without any need for estimating the optimal partition. In the special case that a strictly complementary solution does exist, the order of convergence becomes quadratic. The proof relies on an investigation of the asymptotic behavior of first and second order derivatives that are associated with trajectories of weighted centers for LCP
Multivariate nonnegative quadratic mappings
by ZhiQuan Luo
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2 editions published in 2003 in English and held by 4 WorldCat member libraries worldwide
Avoiding numerical cancellation in the interior point method for solving semidefinite programs
by Jos F Sturm
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2 editions published in 2001 in English and held by 4 WorldCat member libraries worldwide
On the long step pathfollowing method for semidefinite programming
by Jos F Sturm
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Book
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4 editions published in 1996 in English and held by 4 WorldCat member libraries worldwide It has been shown in various recent research reports that the analysis of short step primaldual path following algorithms for linear programming can be nicely generalized to semidefinite programming. However, the analysis of long step pathfollowing algorithms for semidefinite programming appeared to be less straightforward. For such an algorithm, Monteiro obtained an O(n^1.5 log(1/ epsilon)) iteration bound for obtaining an epsilonoptimal solution, where n is the order of the semidefinite decision variable. In this paper, we propose to use a different search direction, viz. the socalled Vspace direction. It is shown that this modification reduces the iteration complexity to O(n log(1/ epsilon)) . Independently, Monteiro and Y.Zhang obtained a similar result using NesterovTodd directions
On cones of nonnegative quadratic functions
by Jos F Sturm
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2 editions published in 2001 in English and held by 4 WorldCat member libraries worldwide
Implementation of interior point methods for mixed semidefinite and second order cone optimization problems
by Jos F Sturm
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2 editions published in 2002 in English and held by 4 WorldCat member libraries worldwide more
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Sturm, J. F. 19712003
Sturm, J. F. (Jos F.)
Sturm, Jos 19712003
Sturm, Jos Fredrik 19712003
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