在這篇論文中，我們考慮一個單一耗散雙曲守恆律。我們研究這種守恆律的初始值問題。我們使用原本由O. Oleinik提供的分析來建立這種初始值問題其熵解整體存在性。

In this thesis we consider a single dissipative hyperbolic scalar conservation law. We study
the initial value problem of such conservation law. We use the analysis originally provided
by O. Oleinik to establish the global existence of entropy solutions for such initial value
problem. In this thesis we will show some key lemmas to obtain the global existence
results.

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