en if the routines to access Hx, H^{-1}x were
> there, getting those at each iteration doesn't really show much
> information, I think.)
>
>
> (Sorry for email reply-chain screw up..)
>
>
> *From: *Stefano Carli
> *Subject: **[petsc-users] obtaining estimated Hessian in
On Tue, Apr 25, 2023 at 8:53 AM Stefano Carli
wrote:
> Dear PETSc developers,
>
>
>
> I’m using PETSc version 3.14.1 coupled to a Fortran code, and I was
> wondering if there is a way of obtaining in output, possibly at each
> iteration, the estimated Hessian matrix for the BQNLS method.
>
It is
..@kuleuven.be
Subject: Re: [petsc-users] obtaining estimated Hessian in BQNLS
petsc's QN routines uses limited-memory variable metric format, which means
explicit hessian is not constructed.
Instead of creating explicit hessian, TAO uses MatSolve, and MatMult, to
"access" the hessian
no Carli
Subject: [petsc-users] obtaining estimated Hessian in BQNLS
Date: April 25, 2023 at 4:15:35 AM EDT
To: "petsc-users@mcs.anl.gov"
Message-Id: <05357d86ee454f49a8499739c3654...@icts-s-exmbx23.luna.kuleuven.be>
Dear PETSc developers,
I’m using PETSc version 3.14.1 coupled t
Dear PETSc developers,
I'm using PETSc version 3.14.1 coupled to a Fortran code, and I was wondering
if there is a way of obtaining in output, possibly at each iteration, the
estimated Hessian matrix for the BQNLS method.
Thank you in advance and best regards,
Stefano Carli
