Also parabolic type equation commonly used now is derived from the hypothetic conditions of ray theory, so it does not include the wave natures completely.

目前通常采用的抛物型方程，也是在射线理论的假设条件推导的。所以，其波动性质也是不完全的。

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In this paper, we consider singularity perturbed problem for a kind of quasilinear elliptic-parabolic type equation with nonlinear boundary value conditions.

本文研究一类拟线性椭圆—抛物型方程，具有非线性边值条件的奇异摄动问题。

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Using the critical estimates of parabolic type partial differential equation. we obtain the error estimates of price and optimal exercise boundary of American option in a jump-diffusion model.

利用抛物型偏微分方程的极值原理，得到了带跳扩散模型下美式期权价格及最佳实施边界的误差估计。

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