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ORCIDAlexander P. Sostak
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- unicode name: Alexander P. Šostak
- affiliation: University of Latvia, Department of Mathematics
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Journal Articles
- 2024
[j21]Alexandr Sostak
, Ingrida Uljane:
Extending L-Topologies to Bipolar L-Fuzzy Topologies. Axioms 13(9): 582 (2024)- 2023
- [j20]Juan-José Miñana, Alexander P. Sostak, Óscar Valero:
On metrization of fuzzy metrics and application to fixed point theory. Fuzzy Sets Syst. 468: 108625 (2023) - [j19]Alexander P. Sostak, Ingrida Uljane:
Powerset operators induced by fuzzy relations as a basis for fuzzification of various mathematical structures. Int. J. Approx. Reason. 155: 17-39 (2023) - 2021
- [j18]Alexander P. Sostak, Ingrida Uljane, Maris Krastins:
Gradation of Fuzzy Preconcept Lattices. Axioms 10(1): 41 (2021) - 2020
- [j17]Olga Grigorenko, Juan-José Miñana, Alexandr Sostak, Óscar Valero:
On t-Conorm Based Fuzzy (Pseudo)metrics. Axioms 9(3): 78 (2020) - [j16]M. K. Dubey, S. P. Tiwari, Alexander P. Sostak:
Categories of quantale-valued fuzzy automata: determinization and minimization. J. Appl. Math. Comput. 63(1-2): 771-785 (2020) - 2018
- [j15]Alexander P. Sostak:
George-Veeramani Fuzzy Metrics Revised. Axioms 7(3): 60 (2018) - [j14]Sang-Eon Han, Alexander P. Sostak:
On the measure of M-rough approximation of L-fuzzy sets. Soft Comput. 22(12): 3843-3855 (2018) - 2016
- [j13]Raivis Bets, Alexander P. Sostak:
Fragmentary Fuzzy Pseudometrics: Basics of the Theory and Applications in Combinatorics on Words. Balt. J. Mod. Comput. 4(4) (2016) - [j12]Alexander P. Sostak, Ingrida Uljane:
L-valued bornologies on powersets. Fuzzy Sets Syst. 294: 93-104 (2016) - [j11]Juan-José Miñana, Alexandr Sostak:
Fuzzifying topology induced by a strong fuzzy metric. Fuzzy Sets Syst. 300: 24-39 (2016) - 2014
- [j10]Sang-Eon Han, In-Soo Kim, Alexander P. Sostak:
On approximate-type systems generated by L-relations. Inf. Sci. 281: 8-20 (2014) - 2013
- [j9]Radko Mesiar, Martin Stepnicka, Alexander P. Sostak:
Fuzzy sets: Theory and applications (FSTA 2012). Fuzzy Sets Syst. 232: 1-2 (2013) - [j8]Dace Cimoka, Alexander P. Sostak:
L-fuzzy syntopogenous structures, Part I: Fundamentals and application to L-fuzzy topologies, L-fuzzy proximities and L-fuzzy uniformities. Fuzzy Sets Syst. 232: 74-97 (2013) - 2010
- [j7]Javier Gutiérrez García, Tomasz Kubiak, Alexander P. Sostak:
Ideal-valued topological structures. Fuzzy Sets Syst. 161(18): 2380-2388 (2010) - [j6]Alexander P. Sostak:
Towards the theory of M-approcimate systems: Fundamentals and examples. Fuzzy Sets Syst. 161(18): 2440-2461 (2010) - [j5]Ferdinand Chovanec, Olga Nánásiová, Alexander P. Sostak:
Preface of the guest editors. Soft Comput. 14(10): 1025-1026 (2010) - 2005
- [j4]Svetlana V. Asmuss, Alexander P. Sostak:
On central algorithms of approximation under fuzzy information. Fuzzy Sets Syst. 155(1): 150-163 (2005) - 1999
- [j3]Martin Kalina, Alexander P. Sostak:
Fuzzy analysis and related topics. Fuzzy Sets Syst. 105(2): 199-200 (1999) - [j2]Svetlana V. Asmuss, Alexander P. Sostak:
Extremal problems of approximation theory in fuzzy context. Fuzzy Sets Syst. 105(2): 249-257 (1999) - 1992
- [j1]Veniamin Shteinbuk, Alexander P. Sostak:
On endomorphism semigroups of a fuzzily structured set. Kybernetika 28(7): 54-57 (1992)
Conference and Workshop Papers
- 2023
- [c20]Alexander P. Sostak, Maris Krastins, Ingrida Uljane:
Conceptuality Degree of Oriented Crisply Generated Fuzzy Preconcepts. EUSFLAT/AGOP 2023: 86-98 - 2022
- [c19]Alexander P. Sostak, Maris Krastins, Ingrida Uljane:
Graded concept lattices in fuzzy rough set theory. CLA 2022: 19-33 - [c18]Raivis Bets, Alexander P. Sostak, Emils Mikelis Mikelsons:
Parameterized Metrics and Their Applications in Word Combinatorics. IPMU (1) 2022: 270-281 - 2021
- [c17]Maris Krastins, Ingrida Uljane, Alexander Shostak:
Application of Graded Fuzzy Preconcept Lattices in Risk Analysis. IJCCI 2021: 177-184 - 2020
- [c16]Alexander P. Sostak, Ingrida Uljane, Patrik Eklund:
Fuzzy Relational Mathematical Morphology: Erosion and Dilation. IPMU (3) 2020: 712-725 - 2019
- [c15]Alexander P. Sostak, Ingrida Uljane:
Some remarks on topological structures in the context of fuzzy relational mathematical morphology. EUSFLAT Conf. 2019 - [c14]Alexander P. Sostak, Ingrida Uljane, Aleksandrs Elkins:
Many-level fuzzy rough approximation spaces induced by many-level fuzzy preorders and the related ditopological structures. EUSFLAT Conf. 2019 - 2017
- [c13]Alexander P. Sostak, Raivis Bets:
Fuzzy φ-pseudometrics and Fuzzy φ-pseudometric Spaces. EUSFLAT/IWIFSGN (3) 2017: 328-340 - [c12]Ingrida Uljane, Alexander P. Sostak:
M-bornologies on L-valued Sets. EUSFLAT/IWIFSGN (3) 2017: 450-462 - 2016
- [c11]Aleksandrs Elkins, Alexander P. Sostak, Ingrida Uljane:
On a Category of Extensional Fuzzy Rough Approximation L-valued Spaces. IPMU (2) 2016: 48-60 - 2015
- [c10]Dikran Dikranjan, Alexander P. Sostak:
On two categories of many valued relations. IFSA-EUSFLAT 2015 - 2014
- [c9]Alexander P. Sostak:
Measure of Roughness for Rough Approximation of Fuzzy Sets and Its Topological Interpretation. IJCCI (FCTA) 2014: 61-67 - [c8]Irina Perfilieva, Alexandr Sostak:
Fuzzy Function and the Generalized Extension Principle. IJCCI (FCTA) 2014: 169-174 - [c7]Sang-Eon Han, Alexander P. Sostak:
M-valued Measure of Roughness for Approximation of L-fuzzy Sets and Its Topological Interpretation. IJCCI (Selected Papers) 2014: 251-266 - [c6]Aleksandrs Elkins, Sang-Eon Han, Alexander P. Sostak:
Variable-Range Approximate Systems Induced by Many-Valued L-Relations. IPMU (3) 2014: 41-50 - 2013
- [c5]Alexander P. Sostak, Ingrida Uljane:
Bornological structures in the context of L-fuzzy sets. EUSFLAT Conf. 2013 - 2011
- [c4]Banu Pazar Varol, Alexander Shostak, Halis Aygün:
Categories Related to Topology Viewed as Soft Sets. EUSFLAT Conf. 2011: 883-890 - [c3]Svetlana V. Asmuss, Alexander P. Sostak:
On spline methods of approximation under L-fuzzy information. FUZZ-IEEE 2011: 1610-1614 - 2009
- [c2]Alexander P. Sostak:
On M-Approximative Operators and M-Approximative Systems. IFSA/EUSFLAT Conf. 2009: 1606-1611 - 2007
- [c1]Ingrida Uljane, Alexander P. Sostak:
On L-valued Equalites on the L-powersets of Many-valued Sets. EUSFLAT Conf. (2) 2007: 387-393
Parts in Books or Collections
- 2015
- [p1]Irina Perfilieva, Alexandr Sostak:
From Lattice Valued Theories to Lattice Valued Analysis. Towards the Future of Fuzzy Logic 2015: 167-182
Coauthor Index
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