la.py 文件源码

def solve_eigen_problem(self, A, B, solver):
        N = A.testfunction[0].N
        s = A.testfunction[0].slice()
        self.V = np.zeros((N, N))
        self.lmbda = np.ones(N)
        if solver == 0:
            self.lmbda[s], self.V[s, s] = scipy_la.eigh(A.diags().toarray(),
                                                        B.diags().toarray())

        elif solver == 1:
            #self.lmbda[s], self.V[s, s] = scipy_la.eigh(B.diags().toarray())
            a = np.zeros((3, N-2))
            a[0, :] = B[0]
            a[2, :-2] = B[2]
            self.lmbda[s], self.V[s, s] = scipy_la.eig_banded(a, lower=True)