数学物理学报 ›› 1998, Vol. 18 ›› Issue (3): 297-301.

• 论文 • 上一篇    下一篇

双纽线|w2+c|=1的弧长

王春杰   

  1. 青岛大学数学系 青岛 266071
  • 收稿日期:1996-10-23 出版日期:1998-09-26 发布日期:1998-09-26

The Arc Length of the Lemniscate|w2+c|=1

Wang Chunjie   

  1. Department of Mathematics, Qingdao University, Qingdao 266071
  • Received:1996-10-23 Online:1998-09-26 Published:1998-09-26

摘要: s(c)为双纽线|w2+c|=1的弧长,c∈「0,+∞).该文讨论了s(c)的性质,并在n=2的情况下解决了Erdös,Herzog和Piranian提出的一个猜测。

关键词: 弧长, 双纽线, 幂级数, 二项式系数

Abstract: Let s(c) be the are length of the lemniscate|w2+c|=1, c ∈[0,+∞). In this paper we discuss some properties of the function s(c), and we solve the case n=2 of a conjecture proposed by Erdos, Herzog and Piranian.

Key words: Arc length, Lemniscate, Power series, Binomial coefficients