@article {17682,
	title = {Algorithm 776: SRRIT: a Fortran subroutine to calculate the dominant invariant subspace of a nonsymmetric matrix},
	journal = {ACM Trans. Math. Softw.},
	volume = {23},
	year = {1997},
	month = {1997/12//},
	pages = {494 - 513},
	abstract = {SRRT is a Fortran program to calculate an approximate orthonomral basis fr a dominant invariant subspace of a real matrix A by the method of simultaneous iteration. Specifically, given an integer m, SRRIT computes a matrix Q with m orthonormal columns and real quasi-triangular matrix T or order m such that the equation AQ = QT is satisfied up to a tolerance specified by the user. The eigenvalues of T are approximations to the m eigenvalues of largest absolute magnitude of A and the columns of Q span the invariant subspace corresponding to those eigenvalues. SRRIT references A only through a user-provided subroutine to form the product AQ; hence it is suitable for large sparse problems.},
	keywords = {invariant subspace, nonsymmetric eigenvalue problem, project method},
	isbn = {0098-3500},
	doi = {10.1145/279232.279234},
	url = {http://doi.acm.org/10.1145/279232.279234},
	author = {Bai,Z. and Stewart, G.W.}
}
