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1. 中国科学技术大学数学系,安徽,合肥,230026
2. 华北工学院理学系,山西,太原,030051
纸质出版:2000
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邵燕灵, 高玉斌. 两类特殊的符号模式矩阵[J]. 中北大学学报(自然科学版), 2000,(2):98-101.
邵燕灵, 高玉斌. Two Classes of Sign Pattern Matrices[J]. 2000, (2): 98-101.
目的 研究符号中心矩阵和 L矩阵 .方法 利用组合论和矩阵论方法 .结果和结论 给出极小符号中心矩阵的一个刻划定理及符号中心矩阵与 L 矩阵之间的关系 .同时也给出了元素全非零的符号中心矩阵和 L矩阵中负元个数的上界及其极矩阵的完全刻划
Aim To study two classes of sign pattern matrices which are L matrices and sign central matrices. Methods By combinatorial and matrix theoretical methods. Results and Conclusion We first give a combinatorial characterization of minimal sign central matrices. Further
a relation of sign central matrices with L matrices be characterized. We also discuss the maximum number of negative entries in entrywise nonzero L matrices and sign central matrices.
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