Communications of the Korean Mathematical Society (대한수학회논문집)
- Volume 10 Issue 3
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- Pages.561-573
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- 1995
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- 1225-1763(pISSN)
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- 2234-3024(eISSN)
The allowance of idempotent of sign pattern matrices
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Lee, Sang-Gu
(Department of Mathematics, Sungkyunkwan University) ;
- Park, Se-Won (Department of Mathematics, Sungkyunkwan University)
- Published : 1995.07.01
Abstract
A matrix whose entries consist of the symbols +, - and 0 is called a sign pattern matrix. In [1], a graph theoretic characterization of sign idempotent pattern matrices was given. A question was given for the sign patterns which allow idempotence. We characterized the sign patterns which allow idempotence in the sign idempotent pattern matrices.
Keywords
- Sign pattern matrix;
- Idempotent;
- Require;
- Allow;
- The upper diagonal completion process;
- A modified Frobenous normal form