Well-Posed Problem

In mathematics, a well-posed problem is one whose solution exists, is unique, and changes continuously with the problem's auxiliary conditions, such as its initial or boundary values. The concept is central to differential equations that describe physical phenomena, since a model failing any of these three properties is considered ill-posed. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/