FRSA 2021 Conference Papers.- Zdzislaw Pawlak and Our Journey with Rough Sets.- Fuzzy -cut in Rough Sets and Its Application.- Named Entity Recognition on CORD-19 Bio-medical Dataset with Tolerance Rough Sets.- Granularity and Rational Approximation: Rethinking Graded Rough Sets.- MADM Strategies Based on Arithmetic and Geometric Mean Operator under Rough-Bipolar Neutrosophic Set Environment.- Single-Valued Neutrosophic Rough Continuous Mapping via Single-Valued Neutrosophic Rough Topological Space.- Regular Paper.- The RSDS - Bibliographic Database for Rough Sets and Related Fields.- Dissertations.- Selected Aspects of Interactive Feature Extraction.- A Study of Algebraic Structures and Logics based on Categories of Rough Sets.

The LNCS journal Transactions on Rough Sets is devoted to the entire spectrum of rough sets related issues, from logical and mathematical foundations, through all aspects of rough set theory and its applications, such as data mining, knowledge discovery, and intelligent information processing, to relations between rough sets and other approaches to uncertainty, vagueness, and incompleteness, such as fuzzy sets and theory of evidence.Volume XXIII in the series is a continuation of a number of research streams that have grown out of the seminal work of Zdzislaw Pawlak during the first decade of the 21st century.

Is a continuation of a number of research streams that have grown out of the seminal work of Zdzislaw Pawlak Features selected papers from the Fuzzy and Rough Sets Association Meeting in 2021 The volume also includes thoroughly reviewed PhD theses dedicated to the rough set approach