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小第5行：
第5行： − 二维热传导方程解的可视化，图中第三个维度表示温度的大小。+
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A visualisation of a solution to the two-dimensional [[heat equation with temperature represented by the third dimension]]
A visualisation of a solution to the two-dimensional [[heat equation with temperature represented by the third dimension]]
以三维表示温度的二维热方程解的可视化
In [[mathematics]], a '''partial differential equation''' ('''PDE''') is a [[differential equation]] that contains unknown [[Multivariable calculus|multivariable functions]] and their [[partial derivative]]s. PDEs are used to formulate problems involving functions of several variables, and are either solved by hand, or used to create a [[computer model]]. A special case is [[ordinary differential equation]]s (ODEs), which deal with functions of a single variable and their derivatives.
In [[mathematics]], a '''partial differential equation''' ('''PDE''') is a [[differential equation]] that contains unknown [[Multivariable calculus|multivariable functions]] and their [[partial derivative]]s. PDEs are used to formulate problems involving functions of several variables, and are either solved by hand, or used to create a [[computer model]]. A special case is [[ordinary differential equation]]s (ODEs), which deal with functions of a single variable and their derivatives.