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+LAPACK is a highly portable Fortran 77 library which provides routines
+for solving systems of simultaneous linear equations, least-squares
+solutions of linear systems of equations, eigenvalue problems, and
+singular value problems. The associated matrix factorizations (LU,
+Cholesky, QR, SVD, Schur, generalized Schur) are also provided, as are
+related computations such as reordering of the Schur factorizations
+and estimating condition numbers. Dense and banded matrices are
+handled, but not general sparse matrices. In all areas, similar
+functionality is provided for real and complex matrices, in both
+single and double precision.