On the Well Posed Problems for a Class of PDE with Double Characteristics
Received:December 01, 1980  
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Wang Chuanfang Hangzhou University 
Lu Zhujia Institute of Applied Mathematics, Chinese Academy of Sciences 
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      In[1]、[2], F. Treves and G.Y.Wang at. al. have studied the following equation Lpu≡uxx-x2uii pui=0, where p stands for a real parameter; They proved that both the Cauchy problem and Goursat problem have a unique solution if and only if p = 2h l. where h≥0 is an integer.
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