# Tokyo/Formulation/4.population model

### From 2007.igem.org

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Next, to consider the number of cells, the differential equations for multiple cells were given as

where N indicates the number of the cells.

In the steady state,time derivatives are zero.As a result,the nullclines of this system were derived as

and then substitute the third equation into the second equation.The nullclines of this system were derived as

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