Hello
To calculate linear stability (eigenmodes), I have faced arpack error max iteration.
matrix A=matrixA(Mh,Mh, solver=UMFPACK);
matrix b=matrixB(Mh,Mh, solver=UMFPACK);
int k=EigenValue(A,b, sigma = sig , nev=nev, value = Evalues, vector= eux, tol=1e-5, ncv=5);
How do we handle this problem?