本文借助于计算机编程给出了有限群在可定向闭曲面T^nr+1上反向自由作用个数的上界,同时决定了反向自由作用于小亏格闭曲面T^nr+1上的有限群以及P-1为素数时反向自由作用于闭曲面T^p上的有限群。
By making use of the computer, we determine upper bounds for the number of orientation- reversing free actions of finite groups on closed orientable surfaces T^nr+1 and all finite groups which act orientation-reversing freely on closed orientable surfaces T^nr+1 with low genus or T^p such that p-1 is a prime.