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 conditions (also known as a combination of model) presence, count, and structure.