利用测度变换和鞅方法，得到了其解析形式的定价公式。
Using the measure transformation and martingale method, the price of the analytic form is obtained.
用相平面法分析螺旋线平衡的稳定性，导出解析形式的稳定性条件。
The stability of the helical equilibrium is analyzed with phase plane method, and an analytical criterion of stability is revealed.
本文导出一种新的半经验的离子晶体的零温物态方程，它具有解析形式。
A new semi-experimentally zero-temperature equation of state with analytical form for ionic crystals is derived in this paper.
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