Abstract
This paper is intended to present a systematic application of the hybrid systems framework to differential games. A special class of bimodal linear-quadratic differential games is presented and illustrated with examples; two particular classes of switching rules, time-dependent and state-dependent switches are discussed. The main contribution of the paper consists in formulating necessary optimality conditions for determining optimal strategies in both cooperative and non-cooperative cases. A practically relevant hybrid differential game of pollution reduction is considered to illustrate the developed framework.

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Notes
Obviously, in the case of minimization the respective matrices must be nonnegative and positive definite.
Here and forth we will use standard notation: x(t) for the state, u(t) for the control and so on. This may contradict the established practice but will allow us to consider various problems in a uniform setting.
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D. Gromov acknowledges the Grants 9.50.1197.2014 and 9.41.721.2015 from St. Petersburg State University, E. Gromova acknowledges the Grant 9.38.245.2014 from St. Petersburg State University.
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Gromov, D., Gromova, E. On a Class of Hybrid Differential Games. Dyn Games Appl 7, 266–288 (2017). https://doi.org/10.1007/s13235-016-0185-3
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DOI: https://doi.org/10.1007/s13235-016-0185-3