collaborators

5 papers

math.NA2026

Non-Asymptotic Variational Learning for Monotone Nonlinear Multiscale Elliptic Equations: Scale-Robust Primal-Dual Bounds and Strong-Form Statistical Ill-Conditioning

Ronald Katende

We develop a non-asymptotic approximation, sampling, and finite-iteration optimization theory for variational physics-informed approximation of uniformly monotone nonlinear multisc…

math.NA2026

No-Harm Physics-Informed Inverse Learning with Residual-Calibrated Uncertainty

Ronald Katende

Physics-informed learning is increasingly used for partial differential equation (PDE)-governed inverse problems, but its reliability remains difficult to certify. This paper devel…

math.DS2025

A Frobenius-Optimal Projection for Enforcing Linear Conservation in Learned Dynamical Models

John M. Mango, Ronald Katende

We consider the problem of restoring linear conservation laws in data-driven linear dynamical models. Given a learned operator and a full-rank constraint matrix e…

math.NA2025

Preserving Extreme Singular Values with One Oblivious Sketch

John M. Mango, Ronald Katende

We study when a single linear sketch can control the largest and smallest nonzero singular values of every rank- matrix. Classical oblivious embeddings require $s=Θ(r/\varepsil…

math.OC2025

Curvature-Adaptive Perturbation and Subspace Descent for Robust Saddle Point Escape in High-Dimensional Optimization

Ronald Katende, Henry Kasumba

High-dimensional non-convex optimization problems in engineering design, control, and learning are often hindered by saddle points, flat plateaus, and strongly anisotropic curvatur…