NIST has released a five-chapter preview of the much-anticipated online Digital Library of Mathematical Functions. In development for over a decade, the DLMF is designed to be a modern successor ...

Mathematical methods and special functions have long served as the backbone of modern theoretical physics and applied mathematics. These tools enable researchers to solve complex differential ...

From the Lyapunov functions of the predator-prey system we construct new Lyapunov functions for three-level food chain models and one prey two predators models. Suppose a Lyapunov function is known ...