Geodesic
Conditions of the survival of population in Nicholson's models with delay
Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika, no. 3 (2010), pp. 29-32

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The Nicholson's model with delay describing dynamics of the magnitude of population is considered. Properties of the model solutions are analyzed, equal apartness of solutions from zero is proved and a lower estimation of decisions as function of the model parameters is found. A two-band model constructed on the basis of Nicholson's model is analyzed. The lower estimations of solutions with various parameters combinations are found.
Keywords: dynamics of the magnitude ofpopulation, apartness from zero, Nicholson's model. 
A. D. Khokhlov. Conditions of the survival of population in Nicholson's models with delay. Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika, no. 3 (2010), pp. 29-32. http://geodesic.mathdoc.fr/item/VYURM_2010_3_a3/
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