Kneser's theorem (differential equations)

In mathematics, the Kneser theorem can refer to two distinct theorems in the field of ordinary differential equations:

• the first one, named after Adolf Kneser, provides criteria to decide whether a differential equation is oscillating or not;
• the other one, named after Hellmuth Kneser, is about the topology of the set of all solutions of an initial value problem with continuous right hand side.