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S. Petra

4 papers hereh-index 12 citations8 works total

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author position
  • middle author1
  • last author3

Across the 4 of 4 papers where every author was matched, so the position is known.

fields
  • math.OC4

identity via Semantic Scholar / OpenAlex

collaborators

4 papers

math.OC2026

Riemannian Multilevel Optimization with Application to Constrained Energy Minimization Problems

Yara Elshiaty, Stefania Petra, Jonas Püschel +2

Multilevel optimization methods are highly effective for discretized energy minimization problems, but their Euclidean formulation does not directly apply to manifold constraints.…

math.OC2025

Multilevel Bregman Proximal Gradient Descent

Yara Elshiaty, Stefania Petra

We present the Multilevel Bregman Proximal Gradient Descent (ML BPGD) method, a novel multilevel optimization framework tailored to constrained convex problems with relative Lipsch…

math.OC2025

Multilevel Optimization: Geometric Coarse Models and Convergence Analysis

Ferdinand Vanmaele, Yara Elshiaty, Stefania Petra

We study multilevel techniques, commonly used in PDE multigrid literature, to solve structured optimization problems. For a given hierarchy of levels, we formulate a coarse model t…

math.OC2025

Information Geometry of Exponentiated Gradient: Convergence beyond L-Smoothness

Yara Elshiaty, Ferdinand Vanmaele, Stefania Petra

We study the minimization of smooth, possibly nonconvex functions over the positive orthant, a key setting in Poisson inverse problems, using the exponentiated gradient (EG) method…

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