A PRIORI BOUNDS FOR PERIODIC SOLUTIONS TO A FUNCTIONAL DIFFERENTIAL EQUATION WITH DELAY |
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| Institution: | Xinyi Chen (China Minorities Information Technology Institute,Northwest University for Nationalities,Lanzhou 730030 |
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| Abstract: | A priori bounds are established for periodic solutions to a functional differential equation with delay.By means of these bounds,an existence theorem for periodic solutions is obtained using Mawhin’s continuation theorem.Our work generalizes the known result. |
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| Keywords: | functional differential equation periodic solution coincidence degree |
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