Acta mathematica scientia,Series A ›› 1981, Vol. 1 ›› Issue (2): 165-176.
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Li Zhishen
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Abstract: In this paper we obtained the asymptotic solution of Helmholtz's ēquation(▽2+k2a(x))u=0 near a smooth convex caustic by means of the approximate method of short-wave and discussed the physical significance of the problems related to the asymptotic solution.
Li Zhishen. ASYMPTOTIC SOLUTION OF HELMHOLTZ'S EQUATION NEAR A CAUSTIC[J].Acta mathematica scientia,Series A, 1981, 1(2): 165-176.
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