Journal article
Existence and uniqueness results for Liénard́s equation having a dead band
In the first part of the present paper we consider general systems of first-order autonomous differential equations and generalize a uniqueness criterion by Dulac concerning periodic solutions to equations of the formdot{x}=P(x,y), dot{y}=Q(x,y). In the second part we use this result to generalize a uniqueness theorem by de Figueiredo concerning periodic solutions to Liénard's equationddot{x} +f(x)dot{x} + g(x) = 0.
By our method we are able to avoid the hitherto usual conditionxg(x) > 0, x {neq} 0, which excludes the possibility for the equation to have a dead band. Finally, we prove an existence theorem concerning periodic solutions to such equations. The use of the theorems is illustrated by a simple example in the last section.
Language: | English |
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Publisher: | IEEE |
Year: | 1980 |
Pages: | 1251-1254 |
ISSN: | 15581276 and 00984094 |
Types: | Journal article |
DOI: | 10.1109/TCS.1980.1084775 |