Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Periodic Solutions Of Lienard Equations   We Prove That The Uniform Upper Bound for the Number Of Limit Cycles Of The
Lienard Equation of Degree 4 Can be equals to 2. Further We Suggest to
Embedding Planar Lienard Equations In Higher Dimension and Present question of
completly integrabiolity of Corresponding Hamiltonians. Actually this Question
Suggest To Look at to Limit Cycles Problems with KAM methods

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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex