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Front Page FilomatPublisher: Faculty of Sciences and Mathematics, NišISSN: 0354-5180Issue: 36_3Date: 2022Journal Homepage

An association between digraphs and rings 715 - 720
Hamza Daoub, Osama Shafah and Aleksandar Lipkovski  
AbstractKeywords: finite graphs; finite rings; symmetric polynomialsMSC: 11T99; 05C90DOI: 10.2298/FIL2203715D
On sublinear quasi-metrics and neighborhoods in locally convex cones 721 - 728
Z Yousefi and M R Motallebi  
AbstractKeywords: Locally convex cones; quasi-metrizability; neighborhoodsMSC: 46A03; 54E35DOI: 10.2298/FIL2203721Y
On integral generalization of Lupaş-Jain operators 729 - 740
Prashantkumar Patel and Murat Bodur  
AbstractKeywords: Lupaş-Jain operators; local approximation; weighted approximation; Voronovskaya type theoremMSC:  41A36; 41A35;41A25DOI: 10.2298/FIL2203729P
On generalized W 2 -curvature tensor of para-Kenmotsu manifolds 741 - 752
Teerathram Raghuwanshi, Shravan Kumar Pandey, Manoj Kumar Pandey and Anil Goyal  
AbstractKeywords: W2-curvature tensor; para-Kenmotsu manifold; Einstein manifold; η-Einstein manifold; Generalized W2-curvature tensorMSC: 53C15; 53C25DOI: 10.2298/FIL2203741R
An existence results for a fractional differential equation with φ-fractional derivative 753 - 762
Moustafa Beddani and Benaouda Hedia  
AbstractKeywords: φ-fractional double derivative; measure of non-compactness; fixed point theorem; Meir-Keeler condensing operatorMSC: 26A33; 34K37; 47H08; 47H10; 34A08; 34A12DOI: 10.2298/FIL2203753B
Some essential spectra of unbounded operator matrices pencils with non-diagonal domain and application 763 - 779
Nedra Moalla and Wafa Selmi  
AbstractKeywords: Operator matrices pencils; Fredholm perturbations; essential spectra; transport operatorMSC: 47A10; 47A53; 34K08DOI: 10.2298/FIL2203763M
Second degree linear forms and semiclassical forms of class one. a case study 781 - 800
Imed Ben Salah, Francisco Marcellán and Mohamed Khalfallah  
AbstractKeywords: Orthogonal polynomials; Classical and semiclassical forms; Stieltjes function; Second degree formsMSC: 33C45; 42C05DOI: 10.2298/FIL2203781B
Sharp bounds for certain m-linear integral operators on p-adic function spaces 801 - 812
Tserendorj Batbold, Yoshihiro Sawano and Ganbaatar Tumendemberel  
AbstractKeywords: m-linear integral operator; Hilbert operator; Hardy operator; Hardy-Littlewood-Pólya operator; p-adic function spaceMSC: 42B35; 11F85; 47A63; 47G10DOI: 10.2298/FIL2203801B
Discontinuous linear Hamiltonian systems 813 - 827
Bilender P Allahverdiev and Hüseyin Tuna  
AbstractKeywords: Hamiltonian system; transmission conditions; maximal operator; minimal operator; self-adjoint operator; spectral resolutionMSC: 34B37; 47E05; 34L10DOI: 10.2298/FIL2203813A
Perfect fluid spacetimes and gradient solitons 829 - 842
Uday Chand De, Carlo Alberto Mantica and Young Jin Suh  
AbstractKeywords: Lorentzian manifolds; perfect fluid spacetime; GRW space-times; Ricci soliton; gradient Ricci soliton; A-Einstein soliton; gradient Schouten soliton; Killing vector fieldMSC: 53C50; 53E20; 53C35; 53E40DOI: 10.2298/FIL2203829D
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