+A **Partial Differential Equation** (PDE) is a mathematical equation relating an unknown multivariate function to its [partial derivatives](/wiki/Partial_Derivative). These equations are fundamental for describing physical phenomena, from fluid dynamics to quantum mechanics, often modeling continuous changes across [space and time](/wiki/Space_and_Time).
+## See also
+- [Differential Equation](/wiki/Differential_Equation)
+- [Heat Equation](/wiki/Heat_Equation)
+- [Wave Equation](/wiki/Wave_Equation)
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