研究生: |
劉信宏 |
---|---|
論文名稱: |
退化偏微分方程之行為 On behavior of Degenerate Partial Differential Equations |
指導教授: | 林俊吉 |
學位類別: |
碩士 Master |
系所名稱: |
數學系 Department of Mathematics |
論文出版年: | 2007 |
畢業學年度: | 95 |
論文頁數: | 21 |
中文關鍵詞: | 唯一延拓 、振盪 |
英文關鍵詞: | unique continuation, oscillation |
論文種類: | 學術論文 |
相關次數: | 點閱:314 下載:13 |
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我們從幾個方向討論退化型偏微分方程的行為表現。在第一節我們修正frequency function而得到對退化拋物方程的唯一延拓性(unique continuation);在第二節我們對Porous medium equation 的正解在n維歐氏空間的外部定義域下,導出Riccati-type 不等式,基於此不等式,我們得到此類方程會振盪(oscillation)的充分條件。
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