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Yugoslav Journal of Operations ResearchPublisher: Faculty of Organizational Sciences, BelgradeISSN: 0354-0243Issue: 32_2Date: 2022Journal Homepage Editorial BoardImpressum   In Memoriam Nenad Mladenović (1951-2022) 147 - 151 Vera Kovačević-Vujčić   The Inverse Minisum Circle Location Problem 153 - 165 Mehraneh Gholami and Jafar Fathali   AbstractKeywords: Minisum Circle Location; Inverse Facility Location; Variable WeightMSC: 90B85; 90B06DOI: 10.2298/YJOR200715027G Sufficiency and Duality of Set-Valued Fractional Programming Problems via Second-Order Contingent Epiderivative 167 - 188 Koushik Das   AbstractKeywords: Convex Cone; Set-Calued Map; Contingent Epiderivative; DualityMSC: 26B25; 49N15DOI: 10.2298/YJOR210218019D A Class of New Type Unified Non-Differentiable Higher Order Symmetric Duality Theorems Over Arbitrary Cones Under Generalized Assumptions 189 - 202 Ramu Dubey, Rajnish Kumar, Khursheed Alam, Lakshmi Narayan Mishra and Vishnu Narayan Mishra   AbstractKeywords: Symmetric Duality; Non-Differentiable Programming; Mixed Duality; Arbitrary ConesMSC: 90C26; 90C30; 90C32; 90C46DOI: 10.2298/YJOR210218020D Knapsack Problem in Fuzzy Nature: Different Models Based on Credibility Ranking Method 203 - 218 Malihe Niksirat and S. Hadi Nasseri   AbstractKeywords: Fuzzy Knapsack Problem; Credibility Ranking Method; Expected-Value Model; Chance-Constraint Model; Pre-Disaster Investment Decision ProblemMSC: 90Bxx; 90CxxDOI: 10.2298/YJOR210219021N Strong Complementary Approximate Karush-Kuhn-Tucker Conditions for Multiobjective Optimization Problems 219 - 234 Jitendra Kumar Maurya and Shashi Kant Mishra   AbstractKeywords: Multiobjective Programming; Approximate Karush-Kuhn-Tucker Conditions; Nonlinear Programming; Sequential Optimality ConditionsMSC: 90C26; 90C30; 90C46DOI: 10.2298/YJOR210315024M On (λ, µ, ζ)-Zweier Ideal Convergence in Intuitionistic Fuzzy Normed Spaces 235 - 250 Carlos Granados and Suman Das   AbstractKeywords: Ideal convergence; Zweier operator; (α; µ; ζ)-convergence; Intuitionistic Fuzzy Normed Spaces.MSC: 40C05; 40J05; 46A45DOI: 10.2298/YJOR210517004G A Novel Technique for Solving Two-Person Zero-Sum Matrix Games in a Rough Fuzzy Environment 251 - 278 Vinod Jangid and Ganesh Kumar   AbstractKeywords: Fuzzy Rough Number; Zero-Sum Game; Fuzzy Rough Game; Multi-Objective Model.MSC: 91A05; 93A30DOI: 10.2298/YJOR210617003J

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