[计] 递推公式, 递归公式

recursion formula的用法和样例：

例句

There is a recursive formula for the number of spanning trees in a graph.对于一个图的生成树的棵数，存在一个递推公式。
Some recursion formulae of Bessel functions are derived from such practice problems as well.并从该实际问题出发，推导出了一类贝塞尔函数的递推公式。

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Argentine president announces return of Formula One

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