# Search results for: Young Bae Jun

Bulletin of the Section of Logic > 2021 > 50 > 1 > 97-123

Bulletin of the Section of Logic > 2021 > 50 > 1 > 81-96

Bulletin of the Section of Logic > 2020 > 49 > 4 > 377-400

Bulletin of the Section of Logic > 2019 > 48 > 3 > 173-185

Afrika Matematika > 2019 > 30 > 7-8 > 1093-1101

Czechoslovak Mathematical Journal > 2018 > 68 > 4 > 1055-1066

_{+}be the semiring of all nonnegative integers and

*A*an

*m*×

*n*matrix over ℤ

_{+}. The rank of

*A*is the smallest

*k*such that

*A*can be factored as an

*m*×

*k*matrix times a

*k*×

*n*matrix. The isolation number of

*A*is the maximum number of nonzero entries in

*A*such that no two are in any row or any column, and no two are in a 2 × 2 submatrix of all nonzero entries. We have that the isolation number of

*A*is...

Beiträge zur Algebra und Geometrie / Contributions to Algebra and Geometry > 2019 > 60 > 1 > 157-165

Afrika Matematika > 2018 > 29 > 5-6 > 887-898

Afrika Matematika > 2016 > 27 > 7-8 > 1339-1346

Advances in Intelligent and Soft Computing > Quantitative Logic and Soft Computing 2010 > Soft Computing > 631-640

Soft Computing > 2017 > 21 > 4 > 1021-1030

Applied Mathematics-A Journal of Chinese Universities > 2015 > 30 > 3 > 299-316

Soft Computing > 2015 > 19 > 8 > 2133-2147

Czechoslovak Mathematical Journal > 2014 > 64 > 3 > 819-826

_{A}be a Boolean {0, 1} matrix. The isolation number of

*A*is the maximum number of ones in

*A*such that no two are in any row or any column (that is they are independent), and no two are in a 2 × 2 submatrix of all ones. The isolation number of

*A*is a lower bound on the Boolean rank of

*A*. A linear operator on the set of

*m*×

*n*Boolean matrices is a mapping which is additive and maps the zero matrix,...