LAPACK Archives

[Lapack] Request: deprecate xPTEQR

Dear LAPACK team,

seeing the recent deprecation of several functions (cf. rev. 1593, 1575,
1563) , I hereby propose to deprecate xPTEQR. xPTEQR is an eigensolver
for hermitian positive definite tridiagonal matrices. A real drawback
is its need to compute a Cholesky factorization yet it offers no subset
computations, or speed and accuracy advantages [1] to compensate for
that. Moreover, the only functions calling xPTEQR are xERRST and
xCHKST.

[1] https://christoph-conrads.name/performance-and-accuracy-of-xpteqr
(The title is based on LAWN 183, "Performance and Accuracy
of LAPACK's Symmetric Tridiagonal Eigensolvers".)

Sincerely
Christoph Conrads

<Prev in Thread] Current Thread [Next in Thread>
  • [Lapack] Request: deprecate xPTEQR, Christoph Conrads <=


For additional information you may use the LAPACK/ScaLAPACK Forum.
Or one of the mailing lists, or