Linear Estimate of the Number of Zeros of Abelian Integrals for a Kind of Quartic Hamiltonians
Linear Estimate of the Number of Zeros of Abelian Integrals for a Kind of Quartic Hamiltonians
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DOI:
10.1006/jdeq.1998.3581
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发表时间:
1999-06
影响因子:
2.4
通讯作者:
Yulin Zhao;Zhifen Zhang
中科院分区:
文献类型:
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作者:
Yulin Zhao;Zhifen Zhang
Abstract An upper bound B(n)⩽7n+5 is derived for the number of zeros of Abelian integrals I(h)=∮Γh g(x, y) dy−f(x, y) dx on the open interval Σ, where Γh is an oval lying on the algebraic curve H(x, y)= 1 2 y2+U(x)=h, deg U(x)=4, and Σ is the maximal interval of existence of Γh. f(x, y), g(x, y) are polynomials of x and y and n=max{deg f(x, y), deg g(x, y)}.