摘要
For a closed orientable surface Sg of genus not smaller than 2,C(Sg) is the curve complex on S g whose vertices consist of the isotopy classes of nontrivial circles on Sg. It has been showed that any two vertices in C(Sg) can be connected by an edge path,and C(Sg) has an infinite diameter. We show that for 0 ≤i≤3g-5,two i-simplices can be connected by an(i +1)-path in C(Sg),and the diameter of C(Sg) under such a distance is infinite.
For a closed orientable surface Sg of genus not smaller than 2,C（Sg） is the curve complex on S g whose vertices consist of the isotopy classes of nontrivial circles on Sg. It has been showed that any two vertices in C（Sg） can be connected by an edge path,and C（Sg） has an infinite diameter. We show that for 0 ≤i≤3g-5,two i-simplices can be connected by an（i ＋1）-path in C（Sg）,and the diameter of C（Sg） under such a distance is infinite.
基金
supported by National Natural Science Foundation of China(Grant Nos.10931005 and 11101058)
the National Science Foundation for Post-doctoral Scientists of China(Grant No.2011M500049)
