Alexander P. Sostak

According to our database, Alexander P. Sostak authored at least 44 papers between 1992 and 2024.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2024

Extending L-Topologies to Bipolar L-Fuzzy Topologies.

Alexandr Sostak, Ingrida Uljane

Axioms, 2024

2023

On metrization of fuzzy metrics and application to fixed point theory.

Juan-José Miñana, Alexander P. Sostak, Óscar Valero

Fuzzy Sets Syst., September, 2023

Powerset operators induced by fuzzy relations as a basis for fuzzification of various mathematical structures.

Alexander P. Sostak, Ingrida Uljane

Int. J. Approx. Reason., April, 2023

Conceptuality Degree of Oriented Crisply Generated Fuzzy Preconcepts.

Alexander P. Sostak, Maris Krastins, Ingrida Uljane

Proceedings of the Fuzzy Logic and Technology, and Aggregation Operators, 2023

2022

Parameterized Metrics and Their Applications in Word Combinatorics.

Raivis Bets, Alexander P. Sostak, Emils Mikelis Mikelsons

Proceedings of the Information Processing and Management of Uncertainty in Knowledge-Based Systems, 2022

Graded concept lattices in fuzzy rough set theory.

Alexander P. Sostak, Maris Krastins, Ingrida Uljane

Proceedings of the Sixteenth International Conference on Concept Lattices and Their Applications (CLA 2022) Tallinn, 2022

2021

Gradation of Fuzzy Preconcept Lattices.

Alexander P. Sostak, Ingrida Uljane, Maris Krastins

Axioms, 2021

Application of Graded Fuzzy Preconcept Lattices in Risk Analysis.

Maris Krastins, Ingrida Uljane, Alexander Shostak

Proceedings of the 13th International Joint Conference on Computational Intelligence, 2021

Graded Fuzzy Preconcept Lattices: Theoretical Basis.

Alexander P. Sostak, Ingrida Uljane, Maris Krastins

Proceedings of the Joint Proceedings of the 19th World Congress of the International Fuzzy Systems Association (IFSA), 2021

Aggregation of Operators of Fuzzy Relational Mathematical Morphology: Erosion and Dilation.

Alexander P. Sostak, Ingrida Uljane

Proceedings of the Joint Proceedings of the 19th World Congress of the International Fuzzy Systems Association (IFSA), 2021

2020

Categories of quantale-valued fuzzy automata: determinization and minimization.

M. K. Dubey, S. P. Tiwari, Alexander P. Sostak

J. Appl. Math. Comput., June, 2020

On t-Conorm Based Fuzzy (Pseudo)metrics.

Olga Grigorenko, Juan-José Miñana, Alexandr Sostak, Óscar Valero

Axioms, 2020

Fuzzy Relational Mathematical Morphology: Erosion and Dilation.

Alexander P. Sostak, Ingrida Uljane, Patrik Eklund

Proceedings of the Information Processing and Management of Uncertainty in Knowledge-Based Systems, 2020

2019

Many-level fuzzy rough approximation spaces induced by many-level fuzzy preorders and the related ditopological structures.

Alexander P. Sostak, Ingrida Uljane, Aleksandrs Elkins

Proceedings of the 11th Conference of the European Society for Fuzzy Logic and Technology, 2019

Some remarks on topological structures in the context of fuzzy relational mathematical morphology.

Alexander P. Sostak, Ingrida Uljane

Proceedings of the 11th Conference of the European Society for Fuzzy Logic and Technology, 2019

2018

On the measure of M-rough approximation of L-fuzzy sets.

Sang-Eon Han, Alexander P. Sostak

Soft Comput., 2018

George-Veeramani Fuzzy Metrics Revised.

Alexander P. Sostak

Axioms, 2018

2017

M-bornologies on L-valued Sets.

Ingrida Uljane, Alexander P. Sostak

Proceedings of the Advances in Fuzzy Logic and Technology 2017 - Proceedings of: EUSFLAT-2017 - The 10th Conference of the European Society for Fuzzy Logic and Technology, September 11-15, 2017, Warsaw, Poland IWIFSGN'2017, 2017

Fuzzy φ-pseudometrics and Fuzzy φ-pseudometric Spaces.

Alexander P. Sostak, Raivis Bets

Proceedings of the Advances in Fuzzy Logic and Technology 2017 - Proceedings of: EUSFLAT-2017 - The 10th Conference of the European Society for Fuzzy Logic and Technology, September 11-15, 2017, Warsaw, Poland IWIFSGN'2017, 2017

2016

L-valued bornologies on powersets.

Alexander P. Sostak, Ingrida Uljane

Fuzzy Sets Syst., 2016

Fuzzifying topology induced by a strong fuzzy metric.

Juan-José Miñana, Alexandr Sostak

Fuzzy Sets Syst., 2016

Fragmentary Fuzzy Pseudometrics: Basics of the Theory and Applications in Combinatorics on Words.

Raivis Bets, Alexander P. Sostak

Balt. J. Mod. Comput., 2016

On a Category of Extensional Fuzzy Rough Approximation L-valued Spaces.

Aleksandrs Elkins, Alexander P. Sostak, Ingrida Uljane

Proceedings of the Information Processing and Management of Uncertainty in Knowledge-Based Systems, 2016

2015

From Lattice Valued Theories to Lattice Valued Analysis.

Irina Perfilieva, Alexandr Sostak

Proceedings of the Towards the Future of Fuzzy Logic, 2015

On two categories of many valued relations.

Dikran Dikranjan, Alexander P. Sostak

Proceedings of the 2015 Conference of the International Fuzzy Systems Association and the European Society for Fuzzy Logic and Technology (IFSA-EUSFLAT-15), 2015

2014

On approximate-type systems generated by L-relations.

Sang-Eon Han, In-Soo Kim, Alexander P. Sostak

Inf. Sci., 2014

Variable-Range Approximate Systems Induced by Many-Valued L-Relations.

Aleksandrs Elkins, Sang-Eon Han, Alexander P. Sostak

Proceedings of the Information Processing and Management of Uncertainty in Knowledge-Based Systems, 2014

Measure of Roughness for Rough Approximation of Fuzzy Sets and Its Topological Interpretation.

Alexander P. Sostak

Proceedings of the FCTA 2014 - Proceedings of the International Conference on Fuzzy Computation Theory and Applications, part of IJCCI 2014, Rome, Italy, 22, 2014

Fuzzy Function and the Generalized Extension Principle.

Irina Perfilieva, Alexandr Sostak

Proceedings of the FCTA 2014 - Proceedings of the International Conference on Fuzzy Computation Theory and Applications, part of IJCCI 2014, Rome, Italy, 22, 2014

M-valued Measure of Roughness for Approximation of L-fuzzy Sets and Its Topological Interpretation.

Sang-Eon Han, Alexander P. Sostak

Proceedings of the Computational Intelligence - International Joint Conference, 2014

2013

Fuzzy sets: Theory and applications (FSTA 2012).

Radko Mesiar, Martin Stepnicka, Alexander P. Sostak

Fuzzy Sets Syst., 2013

L-fuzzy syntopogenous structures, Part I: Fundamentals and application to L-fuzzy topologies, L-fuzzy proximities and L-fuzzy uniformities.

Dace Cimoka, Alexander P. Sostak

Fuzzy Sets Syst., 2013

Bornological structures in the context of L-fuzzy sets.

Alexander P. Sostak, Ingrida Uljane

Proceedings of the 8th conference of the European Society for Fuzzy Logic and Technology, 2013

2011

On spline methods of approximation under L-fuzzy information.

Svetlana V. Asmuss, Alexander P. Sostak

Proceedings of the FUZZ-IEEE 2011, 2011

Categories Related to Topology Viewed as Soft Sets.

Banu Pazar Varol, Alexander Shostak, Halis Aygün

Proceedings of the 7th conference of the European Society for Fuzzy Logic and Technology, 2011

2010

Preface of the guest editors.

Ferdinand Chovanec, Olga Nánásiová, Alexander P. Sostak

Soft Comput., 2010

Towards the theory of M-approcimate systems: Fundamentals and examples.

Alexander P. Sostak

Fuzzy Sets Syst., 2010

Ideal-valued topological structures.

Javier Gutiérrez García, Tomasz Kubiak, Alexander P. Sostak

Fuzzy Sets Syst., 2010

2009

On M-Approximative Operators and M-Approximative Systems.

Alexander P. Sostak

Proceedings of the Joint 2009 International Fuzzy Systems Association World Congress and 2009 European Society of Fuzzy Logic and Technology Conference, 2009

2007

On L-valued Equalites on the L-powersets of Many-valued Sets.

Ingrida Uljane, Alexander P. Sostak

Proceedings of the New Dimensions in Fuzzy Logic and Related Technologies. Proceedings of the 5th EUSFLAT Conference, 2007

2005

On central algorithms of approximation under fuzzy information.

Svetlana V. Asmuss, Alexander P. Sostak

Fuzzy Sets Syst., 2005

1999

Fuzzy analysis and related topics.

Martin Kalina, Alexander P. Sostak

Fuzzy Sets Syst., 1999

Extremal problems of approximation theory in fuzzy context.

Svetlana V. Asmuss, Alexander P. Sostak

Fuzzy Sets Syst., 1999

1992

On endomorphism semigroups of a fuzzily structured set.

Veniamin Shteinbuk, Alexander P. Sostak

Kybernetika, 1992