Geodesic
A general framework for stability analysis of gene regulatory networks with delay
Electronic Journal of Differential Equations, Tome 2008 (2008).

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Summary: A method to study asymptotic properties of solutions to systems of differential equations with distributed time-delays and Boolean-type nonlinearities (step functions) is offered. Such systems arise in many applications, but this paper deals with specific examples of such systems coming from genetic regulatory networks. A challenge is to analyze stable stationary points which belong to the discontinuity set of the system (thresholds). The paper describes an algorithm of localizing stationary points in the presence of delays as well as stability analysis around such points. The basic technical tool consists in replacing step functions by special smooth functions ("the tempered nonlinearities") and investigating the systems thus obtained.
Classification : 34K60, 92D10
Keywords: gene regulation, delay equations, stability 
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     author = {Shlykova, Irina and Ponosov, Arcady and Nepomnyashchikh, Yury and Shindiapin, Andrei},
     title = {A general framework for stability analysis of gene regulatory networks with delay},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2008},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a84/}
}
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Shlykova, Irina; Ponosov, Arcady; Nepomnyashchikh, Yury; Shindiapin, Andrei. A general framework for stability analysis of gene regulatory networks with delay. Electronic Journal of Differential Equations, Tome 2008 (2008). http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a84/