物理学家的研究经常要使用有限格模型——二维棋盘的扩展——作为对连续实在的逼近。
Physicists often work with finite "lattice" models—generalizations of two-dimensional checkerboards—as approximations to continuous reality.
应用物理学中的质量守恒定律、牛顿第二定律、动量定律等，建立了交通流的连续性方程、欧拉方程和动量方程；
Conservation of mass, second Newton's law, and momentum law are introduced into traffic flow to set up traffic continuity equation, Euler's equation, and momentum integral equation.
许多物理学、力学、生物学以及天文学问题的数学模型都是由连续的或离散的迭代过程描述的。
Many mathematical models in physics, mechanics, biology and astronomy are given in such forms. Many problems of dynamical systems can be reduced to an iterative functional equation.
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