Ordinary differential equations
Klein–Gordon equation
Origins of the [partial differential] equations
Nonlinearity [in PDEs]
[PDEs in] higher dimensions
Singular behavior [in PDEs]
Existence and uniqueness [in PDEs]
Field equations
Equation for the background [in my PDEs]
Numerical analysis [of PDEs]
Implementation [of my PDEs]
[PDEs involving] different powers
Other PDEs