摘要
We point out a mistake in the proof of Theorem 9 in the paper of R. Byers and S. Nash [SIAM J. Algebraic Discrete Methods, 8 (1987), pp. 59-66]. Thus, "Theorem 9" is a conjecture. We prove that the conjecture holds for n <= 5.
- 出版日期2015
- 单位哈尔滨工业大学