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Front Page FilomatPublisher: Faculty of Sciences and Mathematics, NišISSN: 0354-5180Issue: 37_5Date: 2023Journal Homepage

Existence and global stability results for Volterra type fractional Hadamard-Stieltjes partial integral equations 1319 - 1329
SaÏd Abbas, Amaria Arara and Mouffak Benchohra  
AbstractKeywords: Volterra partial integral equation; Hadamard-Stieltjes; fractional order; solution; stability; fixed pointMSC: 26A33; 34A40; 45N05; 47H10DOI: 10.2298/FIL2305319A
A characterization of s-pseudospectra of linear operators in a Hilbert space 1331 - 1339
Aymen Ammar, Ameni Bouchekoua and Aref Jeribi  
AbstractKeywords: S-pseudospectra; S-spectrum; linear operator; Hilbert spaceMSC: 47A53; 47A55; 47A10DOI: 10.2298/FIL2305331A
Positive fuzzy quasi-orders on semigroups 1341 - 1365
Miroslav Ćirić, Jelena Ignjatović, Zarko Popović and Aleksandar Stamenković  
AbstractKeywords: Positive fuzzy quasi-order; cm-property; cp-property; lower-potency; completely semiprime fuzzy ideal; completely prime fuzzy ideal; fuzzy filter; semilattice decompositionMSC: 20M10; 20M12; 03F72; 06F05; 06F07; 06A15DOI: 10.2298/FIL2305341C
Some applications of p-(DPL) sets 1367 - 1376
Morteza Alikhani  
AbstractKeywords: Dunford-Pettis property of order p; Dunford-Pettis p-convergent operators; Right sequentially continuousMSC: 46B25; 46G05DOI: 10.2298/FIL2305367A
Extended eigenvalues of 2 × 2 block operator matrices 1377 - 1389
Aymen Ammar, Fatima Zohra Boutaf and Aref Jeribi  
AbstractKeywords: Extended eigenvalue; Spectrum; Point spectrum; 2 × 2 Block matrixMSC: 11B05; 47A53; 39B42DOI: 10.2298/FIL2305377A
Fixed points of a family of mappings and equivalent characterizations 1391 - 1397
Abhijit Pant, R P Pant, M C Joshi and V Rakočević  
AbstractKeywords: Completeness; contractive condition; fixed point; k-continuityMSC: 47H10; 54H25DOI: 10.2298/FIL2305391P
Some results of Fredholm perturbations of multivalued linear operator in normed spaces 1399 - 1408
Aymen Ammar, Aicha Ben Ezzadam and Aref Jeribi  
AbstractKeywords: Multivalued linear operator; Linear selection; Essential spectraMSC: 47A06DOI: 10.2298/FIL2305399A
Non-fundamental trunc-simplex tilings and their optimal hyperball packings and coverings in hyperbolic space i. for families F1-F4 1409 - 1448
Emil Molnár, Milica Stojanović and Jeno Šzirmai  
AbstractKeywords: hyperbolic space group; fundamental domain; isometries; truncated simplex; Poincarè algorithmMSC: 51M20; 52C22; 20H15; 20F55DOI: 10.2298/FIL2305409M
Characterisations of the radical in a Banach algebra 1449 - 1459
Heinrich Raubenheimer and Tshikhudo Lukoto  
AbstractKeywords: Perturbation ideals; radical; regularities; semiregularitiesMSC: 46H05; 46H10; 46H30DOI: 10.2298/FIL2305449R
A family of hybrid derivative-free methods via acceleration parameter for solving system of nonlinear equations 1461 - 1478
Mohammed Yusuf Waziri, Usman Muhammad, Abubakar Sani Halilu and Kabiru Ahmed  
AbstractKeywords: system of nonlinear equations; Newton method; Derivative-free method; hybrid approach; Global convergenceMSC: 65K05; 90C30; 90C53DOI: 10.2298/FIL2305461W
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