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4OR: Quarterly Journal of Operations Research, Volume 19
Volume 19, Number 1, March 2021
- Yves Crama, Michel Grabisch, Silvano Martello:

4OR comes of age. 1-13 - Bruce L. Golden

, Linus Schrage, Douglas R. Shier
, Lida Anna Apergi
:
The power of linear programming: some surprising and unexpected LPs. 15-40 - Thi Hoai Pham

, Hoai An Le Thi
, Nam Nguyen Canh:
Half-open polyblock for the representation of the search region in multiobjective optimization problems: its application and computational aspects. 41-70 - Parvaneh Faramarzi, Keyvan Amini

:
A spectral three-term Hestenes-Stiefel conjugate gradient method. 71-92 - Evgeny Gurevsky, Sergey Kovalev, Mikhail Y. Kovalyov:

Min-max controllable risk problems. 93-101 - Baruch Mor

, Gur Mosheiov:
A note: flowshop scheduling with linear deterioration and job-rejection. 103-111 - Vasco F. Alves

:
Endogenous queue number determination in G/M/s systems. 113-126 - Dang Van Hieu

, Pham Ky Anh, Le Dung Muu:
Modified forward-backward splitting method for variational inclusions. 127-151 - Sarah Itani

:
Towards Explainable Knowledge-Guided Data Mining for Medical Diagnosis Aid: Application to Children Mental Disorders. 153-154 - Yuan Yuan

:
Models and algorithms for last mile delivery problems with multiple shipping options. 155-156
Volume 19, Number 2, June 2021
- Gerhard J. Woeginger

:
The trouble with the second quantifier. 157-181 - László Csató

:
A comparison of penalty shootout designs in soccer. 183-198 - Fabian Dunke

, Stefan Nickel:
Exact distributional analysis of online algorithms with lookahead. 199-233 - Siao-Leu Phouratsamay

, Safia Kedad-Sidhoum, Fanny Pascual:
Coordination of a two-level supply chain with contracts. 235-264 - Arianna Alfieri

, Shuyu Zhou, Rosario Scatamacchia, Steef L. van de Velde:
Dynamic programming algorithms and Lagrangian lower bounds for a discrete lot streaming problem in a two-machine flow shop. 265-288 - Michael Drexl:

On efficient testing of capacity constraints in pickup-and-delivery problems with trailers. 289-307 - Reza Shahbazian

:
Distributed optimization over large-scale systems for big data analytics. 309-310 - Andrea Pizzuti

:
Pricing-based primal and dual bounds for selected packing problems. 311-312
Volume 19, Number 3, September 2021
- Immanuel M. Bomze

, Francesco Rinaldi, Damiano Zeffiro:
Frank-Wolfe and friends: a journey into projection-free first-order optimization methods. 313-345 - Davide Castellano

, Mosè Gallo, Liberatina Carmela Santillo
:
A periodic review policy for a coordinated single vendor-multiple buyers supply chain with controllable lead time and distribution-free approach. 347-388 - Jing Liu, Fuyou Huang, Chao Ma

:
Coordination of VMI supply chain with replenishment tactic under risk aversion and sales effort. 389-414 - Martina Cerulli

, Marianna De Santis
, Elisabeth Gaar
, Angelika Wiegele
:
Improving ADMMs for solving doubly nonnegative programs through dual factorization. 415-448 - Frank Plastria

:
Using the power of ideal solutions: simple proofs of some old and new results in location theory. 449-467 - Lien Vanbrabant

:
Simulation and optimisation of emergency department operations. 469-470 - Paolo Paronuzzi

:
Models and algorithms for decomposition problems. 471-472
Volume 19, Number 4, December 2021
- Ja'far Dehghanpour-Sahron, Nezam Mahdavi-Amiri

:
A competitive optimization approach for data clustering and orthogonal non-negative matrix factorization. 473-499 - Jingfeng Dong

, Shufa Sun, Guichen Gao, Ruoyi Yang:
Pricing and strategy selection in a closed-loop supply chain under demand and return rate uncertainty. 501-530 - Michele Conforti, Marianna De Santis

, Marco Di Summa, Francesco Rinaldi:
Scanning integer points with lex-inequalities: a finite cutting plane algorithm for integer programming with linear objective. 531-548 - Sven Mallach

:
Inductive linearization for binary quadratic programs with linear constraints. 549-570 - Yuan Yuan

, Diego Cattaruzza
, Maxime Ogier, Cyriaque Rousselot, Frédéric Semet:
Mixed integer programming formulations for the generalized traveling salesman problem with time windows. 571-592 - Mostafa Khatami

, Amir Salehipour
:
A binary search algorithm for the general coupled task scheduling problem. 593-611 - Sebastiano Vitali

, Ruth Domínguez
, Vittorio Moriggia
:
Comparing stage-scenario with nodal formulation for multistage stochastic problems. 613-631 - David Van Bulck

:
Sports timetabling: theoretical results and new insights in algorithm performance. 633-634 - Xiajie Yi

:
Dealing with uncertainty in round robin sports scheduling. 635-636

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