Tight sign-central matrices
β Scribed by Suk-Geun Hwang; Ik-Pyo Kim; Si-Ju Kim; Xiao-Dong Zhang
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 139 KB
- Volume
- 371
- Category
- Article
- ISSN
- 0024-3795
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π SIMILAR VOLUMES
The sign pattern matrix A is called sign k-potent if k is the smallest positive integer such that e k1 eX The structure of irreducible, sign k-potent pattern matrices was characterized by Stuart et al. (J. Stuart, C. Eschenbach, S. Kirkland, Linear Algebra Appl. 294 (1999) 85Β±92). We extend those re
The sign pattern matrix A is called sign k-potent if k is the smallest positive integer for which e k1 eX We characterize the irreducible pattern matrices that are sign k-potent and provide a canonical form for such matrices.
A qxn array with entries from {0, 1 ..... q-l} is said to form a difference matrix if the vector difference (modulo q) of each pair of columns consists of a permutation of {0, 1 ..... q -1 }; this definition is inverted from the more standard one to be found, e.g., in Colbourn and de Launey (1996).