Practical Regularized Quasi-Newton Methods with Inexact Function Values

This paper proposes a noise-tolerant regularized quasi-Newton method with a relaxed Armijo-type line search that achieves a global convergence rate of O(1/ε2)\mathcal{O}(1/\varepsilon^2) for smooth nonconvex optimization under inexact function values, demonstrating superior robustness and competitive efficiency in experiments involving both artificial noise and low-precision arithmetic.

Hiroki Hamaguchi, Naoki Marumo, Akiko TakedaThu, 12 Ma🔢 math

Convergence Analysis of a Fully Discrete Observer For Data Assimilation of the Barotropic Euler Equations

This paper establishes the first time-uniform error estimate for a fully discrete Luenberger observer applied to the one-dimensional barotropic Euler equations using mixed finite elements and implicit Euler time integration, demonstrating convergence that depends on initial errors, discretization parameters, and measurement noise via a modified relative energy technique.

Aidan Chaumet, Jan GiesselmannThu, 12 Ma🔢 math

A partitioned optimization framework for structure-aware optimization

This paper introduces a Partitioned Optimization Framework (POf) that reformulates complex optimization problems by identifying variable subsets that render subproblems tractable, and proposes a Derivative-Free Partitioned Optimization method (DFPOm) that efficiently solves these reformulated problems to find global solutions, demonstrating its effectiveness in both infinite-dimensional optimal control and finite-dimensional composite greybox applications.

Charles Audet, Pierre-Yves Bouchet, Loïc BourdinMon, 09 Ma🔢 math

Dynamically optimal portfolios for monotone mean--variance preferences

This paper provides the first complete characterization of optimal dynamic portfolio choice for monotone mean-variance utility in asset models with independent returns under minimal assumptions, establishing a link between maximal utility and the monotone Sharpe ratio while deriving conditions under which classical mean-variance efficient portfolios remain optimal.

Aleš Černý, Johannes Ruf, Martin SchweizerMon, 09 Ma🔢 math

Entropic Mirror Descent for Linear Systems: Polyak's Stepsize and Implicit Bias

This paper introduces a variant of Polyak's stepsizes for entropic mirror descent to solve linear systems without restrictive domain assumptions, establishing sublinear and linear convergence rates, strengthening 1\ell_1-norm implicit bias bounds, and generalizing results to arbitrary convex LL-smooth functions while proposing an exponentiation-free alternative method.

Yura Malitsky, Alexander PoschMon, 09 Ma🤖 cs.LG

Optimized Fish Locomotion using Design-by-Morphing and Bayesian Optimization

This study introduces a computational framework combining Design-by-Morphing and Bayesian optimization to generate undulatory swimming profiles that achieve 16%–35% higher propulsive efficiency than traditional anguilliform and carangiform modes by optimizing kinematic parameters and redistributing energy through favorable surface stress distributions.

Hamayun Farooq, Imran Akhtar, Muhammad Saif Ullah Khalid, Haris Moazam SheikhMon, 09 Ma🔬 physics

StochasticBarrier.jl: A Toolbox for Stochastic Barrier Function Synthesis

StochasticBarrier.jl is an open-source Julia toolbox that efficiently synthesizes Stochastic Barrier Functions for verifying the safety of discrete-time stochastic systems using Sum-of-Squares and piecewise constant optimization methods, demonstrating superior speed, scalability, and safety bounds compared to state-of-the-art tools across over 30 case studies.

Rayan Mazouz, Frederik Baymler Mathiesen, Luca Laurenti, Morteza LahijanianMon, 09 Ma🔢 math

Quantum thermodynamics and semidefinite programming: regularization and algorithms

This paper establishes a general mathematical framework for variational problems in quantum thermodynamics with measurement constraints, leveraging non-commutative optimal transport to analyze dual formulations and zero-temperature limits while tailoring the approach to quantum state tomography and developing convergent computational algorithms.

Emanuele Caputo, Augusto Gerolin, Nataliia Monina, Pavlo Pelikh, Lorenzo PortinaleMon, 09 Ma🔢 math