三叉树方法计算美式期权定价，更加精确而且计算速度增加。有关说明在文件中。-tree method trigeminal American option pricing, and more accurate calculation of the speed increase. The note in the document.

欧式看涨期权三叉树模型的实现，以及障碍期权的运用(The implementation of the trinomial model to the European call option The implementation of a barrier to the European call and out option)