摘要Routh discovered that if the sides BC, CA, AB of a plane triangle ABC are divided at points L, M, N in the respective ratios λ:1, μ: 1, γ: 1, the AL, BM, CN intersect to form a triangle A′B′C′ whose area
1YANG Shoulian LI Yanlin Capital Normal University, Beijing, 100037, China.On the Organizational Problem[J].Systems Science and Systems Engineering,1997,7(1):123-128.
