A NECESSARY AND SUFFICIENT CONDITION FOR THE EXISTENCE OF POSITIVE SOLUTIONS TO SINGULAR BOUNDARY VALUE PROBLEMS
Xu Yumei;Liu Lishan;Zhang Haijun
Journal of Systems Science and Mathematical Sciences ›› 2005, Vol. 25 ›› Issue (5) : 599-607.
A NECESSARY AND SUFFICIENT CONDITION FOR THE EXISTENCE OF POSITIVE SOLUTIONS TO SINGULAR BOUNDARY VALUE PROBLEMS
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