New criteria for the monotonicity of the ratio of two Abelian integrals
New criteria for the monotonicity of the ratio of two Abelian integrals
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两个阿贝尔积分之比单调性的新准则
DOI:
10.1016/j.jmaa.2018.04.074
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发表时间:
2018-09
影响因子:
1.3
通讯作者:
Sun Zhongqin
中科院分区:
文献类型:
--
作者:
Liu Changjian;Chen Guoting;Sun Zhongqin
New criteria to determine the monotonicity of the ratio of two Abelian integrals are given. When two Abelian integrals have the forms∫ Γ h f 1 (x) y d x and∫ Γ h f 2 (x) y d x or the forms∫ Γ h f 1 (x) y d x and∫ Γ h f 2 (x) y d x and Γ h are ovals belonging to the level set {(x, y)| H (x, y)= h}, where H (x, y) has the form y 2/2+ Ψ (x) or ϕ (x) y 2/2+ Ψ (x), we give new criteria, which are defined directly by the functions which appear in the above Abelian integrals, and prove that the monotonicity of the criteria implies the monotonicity of the ratios of the Abelian integrals. The new criteria are applicable in a large class of problems, some of which simplify the existing proofs and some of which generalize known results.
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