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Front Page FilomatPublisher: Faculty of Sciences and Mathematics, NišISSN: 0354-5180Issue: 36_6Date: 2022Journal Homepage

The Co-dynamics of malaria and tuberculosis with optimal control strategies 1789 - 1818
A K Alzahrani and Muhammad Altaf Khan  
AbstractKeywords: Tuberculosis; Malaria; Coinfection; stability analysis; bifurcation analysis; numerical resultsMSC: 92J15DOI: 10.2298/FIL2206789A
Θ-monotone operators and bifunctions 1819 - 1836
Mohsen Alimohammady, Mohammad Hossein Alizadeh, Aida Jahangir, Maede Ramazannejad and Mehdi Roohi  
AbstractKeywords: θ-monotone operator; θ-monotone bifunction; Local boundedness; θ-convexityMSC: 47H05; 47H07; 47H04DOI: 10.2298/FIL2206819A
A new two-step iteration method for discrete ill-posed problems and image restoration 1837 - 1855
Jingjing Cui, Guohua Peng, Quan Lu and Zhengge Huang  
AbstractKeywords: Hermitian and skew-Hermitian splitting; Upper and lower triangular splitting; Iteration method; Image restoration; Ill-posed problemsMSC: 65F10; 65F50; 65N20DOI: 10.2298/FIL2206837C
A new variant of Hildebrandt's theorem for the Weyl spectrum in Banach spaces 1857 - 1864
Salma Charfi, Sassia Rahali and Ines Walha  
AbstractKeywords: Numerical range; Weyl spectrum; numerical spectrum; Weyl numerical spectrum; Hildebrandt’s theoremMSC: 47A12; 47A10; 47D06DOI: 10.2298/FIL2206857C
Exterior square graph of a finite group 1865 - 1872
M Zameni, P Niroomand, M Alizadeh Sanati and M Parvizi  
AbstractKeywords: Exterior square graph; CE-group; Schur multiplierMSC: 05C25; 20P05DOI: 10.2298/FIL2206865Z
On category of t-rough sets 1873 - 1893
Somayyeh Khodaii, Ali Akbar Estaji and Seid Mohammad Anvariyeh  
AbstractKeywords: category; approximation space; product; coproduct; monomorphism; epimorphism; Equalizer; coequalizerMSC: 54C60; 18A20; 18A30DOI: 10.2298/FIL2206873K
Some applications of η−Ricci solitons to contact Riemannian submersions 1895 - 1910
Erol Kılıç and Şemsi Eken Meriç  
AbstractKeywords: Ricci soliton; η−Ricci soliton; contact Riemannian submersion; torqued vector fieldMSC: 53C25; 53D10DOI: 10.2298/FIL2206895K
On the structure of quaternion rings 1911 - 1920
H Cheraghpour, M N Ghosseiri, L Heidari Zadeh and S Safari  
AbstractKeywords: Quaternion ring; Matrix ring; Ideal; RadicalMSC: 16H05; 16S50; 16D25; 16N20DOI: 10.2298/FIL2206911C
Nearest southeast submatrix that makes two prescribed eigenvalues 1921 - 1936
Alimohammad Nazari and Atiyeh Nezami  
AbstractKeywords: Distance of matrices; Eigenvalues; Singular value; Moore-Penrose; Spectral normMSC: 15A18; 15A60; 15A09; 93B10DOI: 10.2298/FIL2206921N
On slater like inequality for vectors transformed by a doubly stochastic matrix with control function 1937 - 1942
Marek Niezgoda  
AbstractKeywords: convex function; gradient inequality; Slater inequality; majorization; doubly stochastic matrix; Schur-concave functionMSC: 26B25; 26D10; 26D15; 52A41DOI: 10.2298/FIL2206937N
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