He majored in mathematical physics, studying mind-bending theories of quantum mechanics and partial differential equations.
partial differential coefficients of the second and higher Interchange of order of differentiations.
It is in this direction that further advance in the theory of partial differential equations must be looked for.
An ordinary differential equation involves only one independent variable, a partial differential equation involves more than one.
The most important theorem in regard to partial differential coefficients is the theorem of the total differential.
We have thus two methods of solving the partial differential equation of the motion of a string.
Sometimes the symbols d or ∂ are dropped, and the partial differential coefficient is denoted by ux or ƒx.
partial differential coefficients of the second order are important in geometry as expressing the curvature of surfaces.