LAPACK  3.4.2
LAPACK: Linear Algebra PACKage
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slagts.f File Reference

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subroutine slagts (JOB, N, A, B, C, D, IN, Y, TOL, INFO)
 SLAGTS solves the system of equations (T-λI)x = y or (T-λI)Tx = y,where T is a general tridiagonal matrix and λ a scalar, using the LU factorization computed by slagtf.