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1. Time Dependent

   Linked via "integral transforms"

   Time dependent (or time-varying) refers to any system, property, or function whose value changes over the progression of temporal duration. In physics, mathematics, and engineering, the concept is fundamental to describing dynamic processes rather than static equilibrium states. A function $f$ is time dependent if it can be expressed as $f(t)$, where $t$ represents the independent variable of time. The degree and nature of this dependency dictate the mathematical tools required for analysis, often nec…