Alexander P. Sostak

Publication Activity (10 Years)

Years Active: 1992-2023
Publications (10 Years): 17

Top Topics

Membership Functions

Approximation Spaces

Fuzzy Relational

Top Venues

Fuzzy Sets Syst.

Publications

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 (2023)
Juan-José Miñana, Alexander P. Sostak, Óscar Valero
On metrization of fuzzy metrics and application to fixed point theory. Fuzzy Sets Syst. 468 (2023)
Alexander P. Sostak, Maris Krastins, Ingrida Uljane
Conceptuality Degree of Oriented Crisply Generated Fuzzy Preconcepts. EUSFLAT/AGOP (2023)
Alexander P. Sostak, Maris Krastins, Ingrida Uljane
Graded concept lattices in fuzzy rough set theory. CLA (2022)
Raivis Bets, Alexander P. Sostak, Emils Mikelis Mikelsons
Parameterized Metrics and Their Applications in Word Combinatorics. IPMU (1) (2022)
Alexander P. Sostak, Ingrida Uljane, Maris Krastins
Gradation of Fuzzy Preconcept Lattices. Axioms 10 (1) (2021)
Alexander P. Sostak, Ingrida Uljane, Patrik Eklund
Fuzzy Relational Mathematical Morphology: Erosion and Dilation. IPMU (3) (2020)
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) (2020)
Alexander P. Sostak, Ingrida Uljane
Some remarks on topological structures in the context of fuzzy relational mathematical morphology. EUSFLAT Conf. (2019)
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)
Sang-Eon Han, Alexander P. Sostak
On the measure of M-rough approximation of L-fuzzy sets. Soft Comput. 22 (12) (2018)
Alexander P. Sostak
George-Veeramani Fuzzy Metrics Revised. Axioms 7 (3) (2018)
Alexander P. Sostak, Raivis Bets
Fuzzy φ-pseudometrics and Fuzzy φ-pseudometric Spaces. EUSFLAT/IWIFSGN (3) (2017)
Ingrida Uljane, Alexander P. Sostak
M-bornologies on L-valued Sets. EUSFLAT/IWIFSGN (3) (2017)
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)
Alexander P. Sostak, Ingrida Uljane
L-valued bornologies on powersets. Fuzzy Sets Syst. 294 (2016)
Aleksandrs Elkins, Alexander P. Sostak, Ingrida Uljane
On a Category of Extensional Fuzzy Rough Approximation L-valued Spaces. IPMU (2) (2016)
Dikran Dikranjan, Alexander P. Sostak
On two categories of many valued relations. IFSA-EUSFLAT (2015)
Sang-Eon Han, In-Soo Kim, Alexander P. Sostak
On approximate-type systems generated by L-relations. Inf. Sci. 281 (2014)
Alexander P. Sostak
Measure of Roughness for Rough Approximation of Fuzzy Sets and Its Topological Interpretation. IJCCI (FCTA) (2014)
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)
Aleksandrs Elkins, Sang-Eon Han, Alexander P. Sostak
Variable-Range Approximate Systems Induced by Many-Valued L-Relations. IPMU (3) (2014)
Radko Mesiar, Martin Stepnicka, Alexander P. Sostak
Fuzzy sets: Theory and applications (FSTA 2012). Fuzzy Sets Syst. 232 (2013)
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 (2013)
Alexander P. Sostak, Ingrida Uljane
Bornological structures in the context of L-fuzzy sets. EUSFLAT Conf. (2013)
Svetlana V. Asmuss, Alexander P. Sostak
On spline methods of approximation under L-fuzzy information. FUZZ-IEEE (2011)
Ferdinand Chovanec, Olga Nánásiová, Alexander P. Sostak
Preface of the guest editors. Soft Comput. 14 (10) (2010)
Alexander P. Sostak
Towards the theory of M-approcimate systems: Fundamentals and examples. Fuzzy Sets Syst. 161 (18) (2010)
Javier Gutiérrez García, Tomasz Kubiak, Alexander P. Sostak
Ideal-valued topological structures. Fuzzy Sets Syst. 161 (18) (2010)
Alexander P. Sostak
On M-Approximative Operators and M-Approximative Systems. IFSA/EUSFLAT Conf. (2009)
Ingrida Uljane, Alexander P. Sostak
On L-valued Equalites on the L-powersets of Many-valued Sets. EUSFLAT Conf. (2) (2007)
Svetlana V. Asmuss, Alexander P. Sostak
On central algorithms of approximation under fuzzy information. Fuzzy Sets Syst. 155 (1) (2005)
Svetlana V. Asmuss, Alexander P. Sostak
Extremal problems of approximation theory in fuzzy context. Fuzzy Sets Syst. 105 (2) (1999)
Martin Kalina, Alexander P. Sostak
Fuzzy analysis and related topics. Fuzzy Sets Syst. 105 (2) (1999)
Veniamin Shteinbuk, Alexander P. Sostak
On endomorphism semigroups of a fuzzily structured set. Kybernetika 28 (7) (1992)