ln9
ln9-
A connected set is constructed on the special fractal set ( generalized Sierpinski rug ), and whose Hausdorff dimension is ln10 / ln9 ; then a differential function is constructed on the connected set to prove that the connected set is a Whitney 's critical set .
在特殊的分形集（广义的Sierpinski地毯）上构造一个Hausdorff维数为ln10/ln9连通集合，然后在该连通集合上构造一个可微函数，利用该函数证明了该连通集合是一个Whitney临界集。