Abstract
In the scientific investigation of any phenomenon, mathematical models are used to give quantitative descriptions and to derive numerical conclusions. These models can take many forms, and one of the most basic and useful is that of a differential equation, that is, an equation involving the rate of change of a quantity. For example, the rate of decrease of the mass of a radioactive substance, such as uranium, is known to be proportional to the present mass.
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Kelley, W.G., Peterson, A.C. (2010). First-Order Differential Equations. In: The Theory of Differential Equations. Universitext, vol 0. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-5783-2_1
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DOI: https://doi.org/10.1007/978-1-4419-5783-2_1
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