what is pde math
Partial Differential Equation. A partial differential equation (PDE) is an equation involving functions and their partial derivatives; for example, the wave equation. (1) Some partial differential equations can be solved exactly in the Wolfram Language using DSolve[eqn, y, x1, x2], and numerically using NDSolve[eqns, y, x, xmin, xmax, t, tmin, tmax].