引入集合的纯偶划分数,给出了一些它的性质,用纯偶划分数得到了伯努利数的一种表示形式,得到正切数的一种递归表示,指出正切数与二进多项式的一个关系式.
The introduction of the pure even partition of set number,given some nature of it with the pure even partition of set number,it has an expression of the number of Bernoulli,get a tangent that the tangent recursion number and binary polynomials of a relationship.