数学季刊 ›› 2006, Vol. 21 ›› Issue (2): 210-219.
摘要: Let P be an inner point of a convex N-gon ΓN:A1A2…ANA1(N≥3), and let di,k denote the distance from the point Ai+k, to the line PAi(i=1,2,…,N,Ai=Aji=j(modN)), which is called the k-Brocard distance for P of ΓN. We have proved the following double-inequality: If P∈ΓN, and then ... .
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