How Can You Tell If A Partial Differential Equation Is Hyperbolic?

How Can You Tell If A Partial Differential Equation Is Hyperbolic? Hyperbolic system of partial differential equations has only real eigenvalues and is diagonalizable. has s distinct real eigenvalues, it follows that it is diagonalizable. In this case the system (∗) is called strictly hyperbolic. is symmetric, it follows that it is diagonalizable and the