On Nilpotence of a Kind of Circulant Matrices over Zp

Details On Nilpotence of a Kind of Circulant Matrices over Zp On Nilpotence of a Kind of Circulant Matrices over Zp

2011-06-11

arxiv.org/abs/1106.2195v1

Mathematics

Combinatorics

4 pages

Scientific paper

We investigate the nilpotence of a kind of circulant matrices $T_{n,m}$ over field $Z_p$ where $T_{n,m}= \sum_{i = 0}^{m - 1} {S_n^i}$ and $S_n$ is the fundamental circulant matrix of order $n$. The necessary and sufficient condition on $n$ and $m$ for determining nilpotence of $T_{n,m}$ over $Z_p$ is presented. Moreover, we obtain a formula for nilpotent index of $T_{n,m}$ when the condition is satisfied. As an application, we give a complete solution of a conjecture of C.Y.Zhang.

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