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FilomatPublisher: Faculty of Sciences and Mathematics, NišISSN: 0354-5180Issue: 33_13Date: 2019Journal Homepage Editorial BoardImpressum   On a type of spacetimes 4251 - 4260 Young Jin Suh and Uday Chand De   AbstractKeywords: Z tensor; Einstein’s field equation; Codazzi type tensor; almost pseudoZ symmetric spacetimes; GRW spacetimesMSC: 53B30; 53C25; 53C50; 53C80DOI: 10.2298/FIL1913251S Classification and approximation of solutions to Sylvester matrix equation 4261 - 4280 Bogdan D Djordjević and Nebojša Č Dinčić   AbstractKeywords: Sylvester equation; matrix spectrum; matrix approximations; eigenvalues and eigenvectors; Jordan normal form; Frobenius norm; least-squares solution; minimal-norm solutionMSC: 47A62; 15A18; 65F15DOI: 10.2298/FIL1913261D Generalized form of fixed point theorems in Banach algebras under weak topology with an application 4281 - 4296 Najib Kaddachi   AbstractKeywords: Banach algebra; Multi-valued mappings; Integral equation; Fixed point theorem; Weakly sequentially closed graphMSC: 45D05; 46E25; 47H10; 19K56DOI: 10.2298/FIL1913281K Lacunary distributional convergence in topological spaces 4297 - 4306 Havva Uluçay and Mehmet Ünver   AbstractKeywords: Distributional convergence; statistical convergence; lacunary sequenceMSC: 54A20; 40J05; 40A05DOI: 10.2298/FIL1913297U Two {4, n − 3}-isomorphic n-vertex digraphs are hereditarily isomorphic 4307 - 4325 Youssef Boudabbous   AbstractKeywords: Reconstruction; isomorphism; hereditarily isomorphic; difference class; prechain; modular decompositionMSC: 05C20;05C60DOI: 10.2298/FIL1913307B Some new fixed point results for multi-valued weakly Picard operators 4327 - 4341 Hassen Aydi, Abdelbasset Felhi, Erdal Karapınar and Hind S Alshahrani   AbstractKeywords: modular metric spaces; ∆2−condition; multi-valued mapping; fixed pointMSC: 47H10; 54H25; 46J10DOI: 10.2298/FIL1913327A Article page: <<123

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