本文中我們建立一個計算樹有限子平移的階的方法。
關鍵字：階、樹有限子平移、主要及非主要符號。

In this paper, we develop and modify a method to compute the degree on tree shifts of finite type.
Keywords：degree, shifts of finite type, essential, inessential.

一、簡介. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
二、前言. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
三、主要定理. . . . . . . . . . . . . . . . . . . . . . . . . . . 7
四、例子. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
五、致謝. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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