16 citations
- 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
Showing 2013 · math.COShow all
3 papers · 2 filters
math.CO2013★ 8 cited
Random Permutations, Random Sudoku Matrices and Randomized Algorithms
Krasimir Yordzhev
Some randomized algorithms, used to obtain a random Sudoku matrix, where is a natural number, is reviewed in this study. Below is described the set of al…
math.CO2013★ 2 cited
Fibonacci sequence related to a combinatorial problem on binary matrices
Krasimir Yordzhev
We discuss an equivalence relation on the set of square binary matrices with the same number of 1's in each row and each column. Each binary matrix is represented using ordered n-t…
math.CO2013★ 3 cited
Bitwise operations related to a combinatorial problem on binary matrices
Krasimir Yordzhev
Some techniques for the use of bitwise operations are described in the article. As an example, an open problem of isomorphism-free generations of combinatorial objects is discussed…