The paper gives several theorems for derivate of the function with finite limit at the infinitepoint and its strict proof.
给出了在无穷远处具有有穷极限的函数的有关导数的几个定理及其严格证明。
2
Another demonstrating method on the conclusion of the system with three virtual hinges at infinitepoint being variable in geometry is brought out.
对三虚铰在无穷远处体系为非几何不变的结论提出了另一种论证方法；
3
Through transforming, some conclusions are given about decomposing index number at higher order isolated singular point and infinitepoint in this paper.