零的焦点

  • 网络Zero Focus;Zero no sh ten
零的焦点零的焦点
  1. 裁判员判罚任意球。一类三次幂零奇点的中心焦点判定与极限环分支

    The referee may award a free kick . Criterion of Center-focus and Limit Cycle Bifurcation for a Class of Three-order Nilpotent Singular Points