:   ..
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:  114
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:  2025
:   .. // . - 2025. - . 114. - .65-86.
:   , ,
(.):  model of cell population development, equilibrium position, localizing se
:   "in vitro" , : , . , . . . , , , , . , . . . , , , , . , , . . , . , , .
(.):  The paper studies a mathematical model of the development of an "in vitro" cellular population system that includes two types of cells, healthy and diseased, such as cancer cells. The model allows one to describe various scenarios of cell behavior, including the degeneration of healthy cells into cancer cells. The model is represented by a second-order ODE system. The phase space of this system is a non-negative orthant, which must be taken into account when analyzing the behavior of this system. An analysis of constraints on the parameters of the system is presented. The paper completes the analysis of equilibrium positions, which was started in earlier works. Conditions are given for the parameters when the system has one, two, three or four equilibrium positions in a non-negative orthant. The condition for the transition of an equilibrium position from a state located inside the positive region to the coordinate axis is described. The conditions for the stability of equilibrium positions in some cases are considered. Phase portraits of the system are constructed for various parameters, illustrating cases of different numbers of equilibrium positions. For the system, using the method of localization of invariant compacts, boundaries for limited trajectories are found, conditions are determined when there is no cycle in the obtained localizing set.

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