16 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Bulgarian Academy of SciencesBG16 papers
- Institute of Mathematics and InformaticsBG13 papers
- Joint Institute for Nuclear ResearchRU11 papers
- P.N. Lebedev Physical Institute of the Russian Academy of SciencesRU7 papers
- University of PotsdamDE7 papers
- Universidade Nova de LisboaPT5 papers
- Academy of Sciences Republic of UzbekistanUZ4 papers
- Institute for Nuclear Research and Nuclear EnergyBG4 papers
- Institute of Space Science - INFLPR SubsidiaryRO4 papers
- Russian Academy of SciencesRU4 papers
- Instituto Politécnico de LisboaPT3 papers
- Jizzakh State Pedagogical UniversityUZ3 papers
5 papers · 1 filter
On the Number of Disjoint Pairs of S-permutation Matrices
Krasimir Yankov Yordzhev
In [Journal of Statistical Planning and Inference (141) (2011) 3697-3704], Roberto Fontana offers an algorithm for obtaining Sudoku matrices. Introduced by Geir Dahl concept disjoi…
Computer Administering of the Psychological Investigations: Set-relational Representation
Krasimir Yordzhev, Ivelina Peneva
Computer administering of a psychological investigation is the computer representation of the entire procedure of psychological assessments - test construction, test implementation…
Stable varieties of semigroups and groupoids
Sl. Shtrakov, J. Koppitz
The paper deals with composition and -essential composition of terms, which lead to stable and s-stable varieties of algebras. A full description of all stable varieties of…
Bipartite graphs related to mutually disjoint S-permutation matrices
Krasimir Yordzhev
Some numerical characteristics of bipartite graphs in relation to the problem of finding all disjoint pairs of S-permutation matrices in the general case are discu…
An Entertaining Example of Using the Concepts of Context-Free Grammar and Pushdown Automation
Krasimir Yordzhev
A formal-linguistic approach for solving an entertaining task is made in this paper. The well-known task of the Hanoi towers is discussed in relation to some concepts of discrete m…