Introduction - If you have any usage issues, please Google them yourself
Function: Lagrangian method for solving equality constrained quadratic programming: min f (x) = 0.5* x Hx+ c x, s.t.Ax = b
Input: H, c are the matrix and vector objective function, A, b are the constraints in the matrices and vectors
Output: (x, lam) is KT point, fval optimal value.