A model estimating the volume of users interacting through a two-sided Internet platform (allowing interaction of two types of users) will teach students how to analyze a 2-dimensional dynamical system. The model will illustrate how the question of existence of closed orbits can be investigated. With the help of Excel spreadsheets, students will simulate the model or will enter real-life Internet platform data. The software will generate the pictures of the corresponding vector fields, which students will analyze and then use the theory of dynamical systems to justify their findings. The software does not require any installation, it can be opened with MSExcel.
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