Arnoldi algorithms in ScaLAPACK

[makarem]

Dear all,
I'm a new user of LAPACK/ScaLAPACK. I want to developp the Expliciltly Restarted Arnoldi Method ( ERAM ) to compute few eigenvalues of a large dense non Hermitien matrix.
I need to use the Arnoldi projection method to reduce a large matrix A of order n to an upper hessenberg matrix H of order m with m << n.
So my question is: is there in ScaLAPACK library a subroutine that implement the Arnoldi or the Gram–Schmidt algorithms.
Thak you in advance for your help.
Best regards
Makarem

[Julien Langou]

There is no Gram-Scmidt nor Arnoldi in ScaLAPACK nor LAPACK.
You may have look at ARPACK or PARPACK. If you need only a
few of the eigenvalues and the matrix is large, then using ARPACK
or PARPACK is good idea. Cheers,
Julien.

[makarem]

OK, thank you for your answer.