lapack: LAPACK (linear algebra routines) 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 matrix lapack: factorizations (LU, Cholesky, QR, SVD, Schur, generalized Schur) are lapack: also provided, as are related computations such as reordering of the lapack: Schur factorizations and estimating condition numbers. Dense and banded lapack: matrices are handled, but not general sparse matrices. In all areas, lapack: similar functionality is provided for real and complex matrices, in lapack: both single and double precision.