PROBLEM OF EQUIVALENCE OF THE INTEGRAL ∫F(x, y, y′, y″,…, y~((n))) dx
Acta Mathematica Sinica, Chinese Series ›› 1954, Vol. 4 ›› Issue (2) : 223-243.
PROBLEM OF EQUIVALENCE OF THE INTEGRAL ∫F(x, y, y′, y″,…, y~((n))) dx
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