👉 In mathematics, an eigenvalue of a square matrix A is a non-zero number that, when multiplied by A, yields another number. An eigenvalue can be complex or real, and it represents the "determinant" of the matrix, which is a scalar value. The eigenvectors associated with each eigenvalue form a basis for the space of matrices that are invariant under the action of A. The study of eigenvalues has significant applications in various fields such as physics, engineering, economics