为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

In this paper, we give a cobordism proof of the higher dimensional Rokhlin congruences established in [8]....

We give the sharp estimates for the degree of symmetry and the semi-simple degree of symmetry of certain compact fiber b......