On a conjecture about relative lengths

  • Zhanjun Su

    Hebei Normal University, Shijiazhuang, China
  • Ren Ding

    Hebei Normal University, Shijiazhuang, China

Cite this article

Zhanjun Su, Ren Ding, On a conjecture about relative lengths. Elem. Math. 61 (2006), no. 3, pp. 117–124

DOI 10.4171/EM/40