Two different points of view in analyzing problems in mechanics The Eulerian view(欧拉观点) and the Lagrangian view(拉格朗日观点) Flow classification Streamline(流线)Pathline(迹线)& Flowfield (流场)流线方程计算流谱 Surface force(表面力) and body force(质量力,体积力)
Types of options A call is an option to buy A put is an option to sell A European option can be exercised only at the end of its life An American option can be exercised at any time