lapack: LAPACK (Linear Algebra PACKage) lapack: lapack: LAPACK is a library of Fortran subroutines for solving the most lapack: commonly occurring problems in numerical linear algebra like solving lapack: systems of simultaneous linear equations, least-squares solutions lapack: of linear systems of equations, eigenvalue problems, and singular lapack: value problems. The associated matrix factorizations (LU, lapack: Cholesky, QR, SVD, Schur, generalized Schur) are also provided, lapack: as are related computations such as reordering of the Schur lapack: factorizations and estimating condition numbers. Dense and banded lapack: matrices are handled, but not general sparse matrices. In all lapack: areas, similar functionality is provided for real and complex lapack: matrices, in both single and double precision. lapack: The package contains also the Fortran subroutines of the Basic Linear lapack: Algebra Subprograms (the Level 1, 2, and 3 BLAS), CBLAS, a C interface lapack: to the BLAS, and LAPACKE, a C interface to LAPACK. lapack: lapack: Packaged by Georgi D. Sotirov