摘要: In this short paper, our purpose is to give an affirmative answer to a problem raised by L. N. Shevrin in [1] for some special cases.
黄允宝. On L. N. Shevrin's Problem[J]. 数学季刊, 1993, 8(2): 60-62.
Huang Yunbao. On L. N. Shevrin's Problem[J]. Chinese Quarterly Journal of Mathematics, 1993, 8(2): 60-62.