Chee Khian Sim

EmailChee-Khian.Simport.acuk

Accepting PhD Students

PhD projects

I am keen to supervise PhD students in the field of mathematics of operational research or mathematical optimisation and its applications.

19 Article

19 results

2025
Refining asymptotic complexity bounds for nonconvex optimization methods, including why steepest descent is o(ɛ-2) rather than O(ɛ-2)
Gratton, S., Sim, C. K. & Toint, P. L., 18 Jun 2025, (Accepted for publication) In: Computational Optimization and Applications. 11 p.
Research output: Contribution to journal › Article › peer-review
2023
Convergence rates for the relaxed Peaceman-Rachford splitting method on a monotone inclusion problem
Sim, C. K., 1 Jan 2023, In: Journal of Optimization Theory and Applications. 196, p. 298–323
Research output: Contribution to journal › Article › peer-review

Open Access
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36 Downloads (Pure)
2021
A FISTA-type accelerated gradient algorithm for solving smooth nonconvex composite optimization problems
Liang, J., Monteiro, R. & Sim, C. K., 13 May 2021, In: Computational Optimization and Applications. 79, p. 649-679 31 p.
Research output: Contribution to journal › Article › peer-review

Open Access
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98 Downloads (Pure)
2019
Interior point method on semi-definite linear complementarity problems using the Nesterov-Todd (NT) search direction: polynomial complexity and local convergence
Sim, C. K., 1 Nov 2019, In: Computational Optimization and Applications. 74, 2, p. 583-621 39 p., 0.
Research output: Contribution to journal › Article › peer-review

Open Access
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186 Downloads (Pure)
2018
Complexity of the relaxed Peaceman-Rachford splitting method for the sum of two maximal strongly monotone operators
Monteiro, R. & Sim, C. K., 1 Jul 2018, In: Computational Optimization and Applications. 70, 3, p. 763-790 28 p.
Research output: Contribution to journal › Article › peer-review

Open Access
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133 Downloads (Pure)
2017
Infinite horizon optimal policy for an inventory system with two types of product sharing common hardware platforms
Chou, M. C., Sim, C. K. & Yuan, X.-M., 2 Jan 2017, In: Operations Research Letters. 45, 1, p. 12-18 7 p.
Research output: Contribution to journal › Article › peer-review

Open Access
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263 Downloads (Pure)
2015
A subgradient method based on gradient sampling for solving convex optimization problems
Hu, Y., Sim, C.-K. & Yang, X., 31 Dec 2015, In: Numerical Functional Analysis and Optimization. 36, 12, p. 1559-1584 26 p.
Research output: Contribution to journal › Article › peer-review

Open Access
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328 Downloads (Pure)
Inexact subgradient methods for quasi-convex optimization problems
Hu, Y., Yang, X. & Sim, C.-K., 16 Jan 2015, In: European Journal of Operational Research. 240, 2, p. 315-327 13 p.
Research output: Contribution to journal › Article › peer-review

Open Access
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355 Downloads (Pure)
On finding a generalized lowest rank solution to a linear semi-definite feasibility problem
Sim, C. K., 1 May 2015, In: Operations Research Letters. 43, 3, p. 334-338 5 p.
Research output: Contribution to journal › Article › peer-review

Open Access
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241 Downloads (Pure)
2013
Optimal policies for inventory systems with two types of product sharing common hardware platforms: single period and finite horizon
Chou, M. C., Sim, C.-K. & Yuan, X.-M., 16 Jan 2013, In: European Journal of Operational Research. 224, 2, p. 283-292
Research output: Contribution to journal › Article › peer-review
The impact of supply chain visibility when lead time is random
Chew, E. K. P., Lee, L. H. & Sim, C.-K., Jan 2013, In: OR Spectrum. 35, 1, p. 163-190
Research output: Contribution to journal › Article › peer-review
2012
Newsvendor pricing problem in a two-sided market
Chou, M. C., Sim, C.-K., Teo, C.-P. & Zheng, H., 2012, In: Production and Operations Management. 21, 1, p. 204-208
Research output: Contribution to journal › Article › peer-review
2011
Asymptotic behavior of underlying NT paths in interior point methods for monotone semidefinite linear complementarity problems
Sim, C.-K., Jan 2011, In: Journal of Optimization Theory and Applications. 148, 1, p. 79-106
Research output: Contribution to journal › Article › peer-review
Superlinear convergence of an infeasible predictor-corrector path-following interior point algorithm for a semidefinite linear complementarity problem using the Helmberg-Kojima-Monteiro direction
Sim, C.-K., 2011, In: SIAM Journal on Optimization. 21, 1, p. 102-126
Research output: Contribution to journal › Article › peer-review
2009
On the analyticity of underlying HKM Paths for monotone semidefinite linear complementarity problems
Sim, C. K., Apr 2009, In: Journal of Optimization Theory and Applications. 141, 1, p. 193-215
Research output: Contribution to journal › Article › peer-review
2008
Asymptotic behavior of Helmberg-Kojima-Monteiro (HKM) paths in interior-point methods for monotone semidefinite linear complementarity problems: general theory
Sim, C. K. & Zhao, G., Apr 2008, In: Journal of Optimization Theory and Applications. 137, 1, p. 11-25
Research output: Contribution to journal › Article › peer-review
2007
Underlying paths in interior point methods for the monotone semidefinite linear complementarity problem
Sim, C.-K. & Zhao, G., Sept 2007, In: Mathematical Programming. 110, 3, p. 475-499
Research output: Contribution to journal › Article › peer-review
2006
A note on the Lipschitz continuity of the gradient of the squared norm of the matrix-valued Fischer-Burmeister function
Sim, C. K., Sun, J. & Ralph, D., Jul 2006, In: Mathematical Programming. 107, 3, p. 547-553
Research output: Contribution to journal › Article › peer-review
2005
A note on treating a second order cone program as a special case of a semidefinite program
Sim, C. K. & Zhao, G., Apr 2005, In: Mathematical Programming. 102, 3, p. 609-613
Research output: Contribution to journal › Article › peer-review

Chee Khian Sim

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