离散数学课件。很有用。是名牌大学的课件，对自学和基础不好的人很管用。-Discrete Mathematics courseware. Useful. Is the famous universities of the courseware, on the basis of self-learning and bad people are very effective.

这道题是来判断离散数学中的自反，反自反，对称，反对称，传递的关系的-qun oneslef

组合数学（combinatorial mathematics），又称为离散数学。狭义的组合数学主要研究满足一定条件的组态（也称组合模型）的存在、计数以及构造等方面问题。-Combinatorial Mathematics (combinatorial mathematics), also known as discrete mathematics. Narrow combination of mathematical research configuration to meet certain

在数学建模中国离散规划时用这个程序很好用-China in the mathematical modeling of discrete planning to use this program very easy to use