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A Class of Positive Coefficient Ordinary Differential Operators with Middle Deficiency Indexes
Zhan Kuan GUO,Jiong SUN
Acta Mathematica Sinica, Chinese Series ›› 2000, Vol. 43 ›› Issue (6) : 1031-104.
A Class of Positive Coefficient Ordinary Differential Operators with Middle Deficiency Indexes
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