## Sufficient conditions for the existence positive periodic solutions of a class of neutral delay models with feedback control.(English)Zbl 1096.93017

The authors apply coincidence degree theory to establish existence of periodic positive solutions of a control system, described by a non-autonomous neutral functional differential equation with feedback control.

### MSC:

 93C23 Control/observation systems governed by functional-differential equations 34K40 Neutral functional-differential equations 93B52 Feedback control 34K13 Periodic solutions to functional-differential equations
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### References:

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