Differential equations constitute a central area of study in pure and applied mathematics, physics, and engineering. These disciplines examine differential equations from different perspectives: pure mathematics is primarily concerned with theoretical aspects such as the existence, uniqueness, and qualitative behavior of solutions, whereas applied mathematics focuses on developing and validating methods for obtaining approximate solutions. Differential equations serve as powerful tools for describing and analyzing a wide range of physical, technical, and biological phenomena, including planetary motion, structural engineering systems, fluid flow, and neural interactions. In many practical situations, the resulting equations do not admit exact analytical solutions; therefore, numerical techniques are employed to obtain approximate results. A large number of problems encountered in science and engineering can be effectively modeled using differential equations. The process of constructing mathematical models aims to represent real-world systems in a precise and quantitative manner, which is a fundamental objective of applied mathematics.
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