Harmonic analysis studies the representation of functions as superpositions of basic waves. At its core, it seeks to understand oscillatory phenomena through tools such as Fourier transforms, singular ...

Nonlinear elliptic equations form a central class of partial differential equations characterised by the presence of an elliptic operator whose behaviour depends nonlinearly on the solution or its ...

Author Nick Sullivan worked for six years at Apple on many of its most important cryptography efforts before recently joining CloudFlare, where he is a systems engineer. He has a degree in mathematics ...