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file readme for overview of laso file dilaso.f dilaso.f plus dependencies for all eigenvalues and eigenvectors of a sparse symmetric matrix outside an excluded interval, block Lanczos with orthogonalization prec double gams d4a1, d4a7 file silaso.f silaso.f plus dependencies for all eigenvalues and eigenvectors of a sparse symmetric matrix outside an excluded interval, block Lanczos with orthogonalization prec single gams d4a1, d4a7 file dnlaso.f dnlaso.f plus dependencies for a few eigenvalues and eigenvectors of a sparse symmetric matrix from either end of the spectrum, block Lanczos with orthogonalization prec double gams d4a1, d4a7 file snlaso.f snlaso.f plus dependencies for a few eigenvalues and eigenvectors of a sparse symmetric matrix from either end of the spectrum, block Lanczos with orthogonalization prec single gams d4a1, d4a7 file doc for user manual for the LASO package file lanczos3 for sample driver program for the LASO package