Dear PETSc/Tao team, this is still an open issue andI haven't heard anything else so far that I'm wrong.
Kind regards, Stephan Köhler Am 18.07.23 um 02:21 schrieb Matthew Knepley:
Toby and Hansol, Has anyone looked at this? Thanks, Matt On Mon, Jun 12, 2023 at 8:24 AM Stephan Köhler < stephan.koeh...@math.tu-freiberg.de> wrote:Dear PETSc/Tao team, I think there might be a bug in the Tao ALMM class: In the function TaoALMMComputeAugLagAndGradient_Private(), see, eg. https://petsc.org/release/src/tao/constrained/impls/almm/almm.c.html#TAOALMM line 648 the gradient seems to be wrong. The given function and gradient computation is Lc = F + Ye^TCe + Yi^T(Ci - S) + 0.5*mu*[Ce^TCe + (Ci - S)^T(Ci - S)], dLc/dX = dF/dX + Ye^TAe + Yi^TAi + 0.5*mu*[Ce^TAe + (Ci - S)^TAi], but I think the gradient should be (without 0.5) dLc/dX = dF/dX + Ye^TAe + Yi^TAi + mu*[Ce^TAe + (Ci - S)^TAi]. Kind regards, Stephan Köhler -- Stephan Köhler TU Bergakademie Freiberg Institut für numerische Mathematik und Optimierung Akademiestraße 6 09599 Freiberg Gebäudeteil Mittelbau, Zimmer 2.07 Telefon: +49 (0)3731 39-3173 (Büro)
-- Stephan Köhler TU Bergakademie Freiberg Institut für numerische Mathematik und Optimierung Akademiestraße 6 09599 Freiberg Gebäudeteil Mittelbau, Zimmer 2.07 Telefon: +49 (0)3731 39-3188 (Büro)
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