lapack: lapack (Linear Algebra PACKage) lapack: lapack: LAPACK provides routines for solving systems of simultaneous linear lapack: equations, least-squares solutions of linear systems of equations, lapack: eigenvalue problems, and singular value problems. The associated lapack: matrix factorizations (LU, Cholesky, QR, SVD, Schur, generalized lapack: Schur) are also provided, as are related computations such as lapack: reordering of the Schur factorizations and estimating condition lapack: numbers. Dense and banded matrices are handled, but not general sparse lapack: matrices. In all areas, similar functionality is provided for real and lapack: complex matrices, in both single and double precision.