Tootfinder

Balancing Quality and Variation: Spam Filtering Distorts Data Label Distributions
Eve Fleisig, Matthias Orlikowski, Philipp Cimiano, Dan Klein
https://arxiv.org/abs/2509.08217 h…

Balancing Quality and Variation: Spam Filtering Distorts Data Label Distributions
For machine learning datasets to accurately represent diverse opinions in a population, they must preserve variation in data labels while filtering out spam or low-quality responses. How can we balance annotator reliability and representation? We empirically evaluate how a range of heuristics for annotator filtering affect the preservation of variation on subjective tasks. We find that these methods, designed for contexts in which variation from a single ground-truth label is considered noise, …

🇺🇦 #NowPlaying on KEXP's #VarietyMix
Mitski:
🎵 Geyser
#Mitski
https://olivebunyan.bandcamp.com/album/geyser-mitski
https://open.spotify.com/track/2fCdOF4nBAeQaXW84WjoiU

Augmentation Algorithms for Total Variation-Regularized Integer Programs
Dominic Yang, Sven Leyffer, Miles Bakenhus
https://arxiv.org/abs/2508.05822 https://

Augmentation Algorithms for Total Variation-Regularized Integer Programs
We address a class of integer optimization programs with a total variation-like regularizer and convex, separable constraints on a graph. Our approach makes use of the Graver basis, an optimality certificate for integer programs, which we characterize as corresponding to the collection of induced connected subgraphs of our graph. We demonstrate how to use this basis to craft an exact global optimization algorithm for the unconstrained problem recovering a method first shown in [16]. We then pre…

Period maps at infinity
Mark Green, Phillip Griffiths, Colleen Robles
https://arxiv.org/abs/2509.08508 https://arxiv.org/pdf/2509.08508

Period maps at infinity
Let $\overline{B}$ be a smooth projective varieity, and $Z \subset \overline{B}$ a simple normal crossing divisor. Assume that $B = \overline{B} - Z$ admits a variation of pure, polarized Hodge structure. The divisor $Z$ is naturally stratified, and Schmid's nilpotent orbit theorem defines a family/variation of nilpotent orbits along each strata. We study the rich geometric structure encoded by this family, its relationship to the induced (quotient) variation of pure Hodge structure on the stra…

🇺🇦 #NowPlaying on KEXP's #VarietyMix
John Prine:
🎵 Clocks and Spoons
#JohnPrine
https://boxofspiders.bandcamp.com/track/clocks-and-spoons-john-prine
https://open.spotify.com/track/57M2Tzakrrj4pecyVet6kM

Time-Varying Volatility of Bank Betas
Matt Brigida
https://arxiv.org/abs/2510.07671 https://arxiv.org/pdf/2510.07671

Time-Varying Volatility of Bank Betas
Research has shown banks match interest income and expense betas, and thereby obtain net interest income margins which are insensitive to changes in short-term interest rates. The present analysis extends this research in a number of ways. First, we use state-space methods to estimate time-varying betas and test whether they are matched at each time interval. We find substantial variation in interest income and expense betas, which drives variation in net interest margin beta coefficients. Seco…

Topological edge states and amplitude-dependent delocalization in quasiperiodic elliptically geared lattices
Shuaifeng Li, Di Zhou, Feng Li, Panayotis G. Kevrekidis, Jinkyu Yang
https://arxiv.org/abs/2508.06286

Topological edge states and amplitude-dependent delocalization in quasiperiodic elliptically geared lattices
We present a class of mechanical lattices based on elliptical gears with quasiperiodic modulation and geometric nonlinearity, capable of exhibiting topologically protected modes and amplitude-driven transitions. Starting from a one-dimensional chain of modulated elliptical gears, we demonstrate the emergence of localized edge states arising from quasiperiodic variation in the gears' moments of inertia, analogous to the topological edge modes of the Aubry-Andre-Harper model. Under increasing exc…

Convergence analysis for pseudo-monotone variational inequality problem involving projections onto a moving ball
Watanjeet Singh, Sumit Chandok
https://arxiv.org/abs/2509.05589 …

Convergence analysis for pseudo-monotone variational inequality problem involving projections onto a moving ball
This paper presents an iterative scheme that converges to the solution of a pseudo-monotone variational inequality problem in the setting of $\mathbb{R}^{n}$. Traditional methods often require projections onto the feasible set $\mathfrak{C}$ or onto a half-space containing $\mathfrak{C}$. However, computing projections onto a complicated feasible set can be difficult, and projections onto a half-space may fall outside $\mathfrak{C}$. Keeping this in mind, we aim to develop an iterative scheme t…

Spectral Fingerprints of Algebraic Cycles on K3 Surfaces: A Hodge-Theoretic Perspective
Bita Hajebi, Pooya Hajebi
https://arxiv.org/abs/2507.07234 https://…

Spectral Fingerprints of Algebraic Cycles on K3 Surfaces: A Hodge-Theoretic Perspective
This paper introduces a novel framework, the "Spectral Fingerprint Philosophy," for extracting intrinsic algebraic information from Hodge cycles, particularly divisors, on K3 surfaces. We depart from traditional geometric spectral analysis, which relies on the Laplace-Beltrami operator and faces significant computational challenges for Ricci-flat Kahler metrics. Instead, we leverage the powerful machinery of Hodge theory, variation of Hodge structures (VHS), and arithmetic geometry. We demonstr…

State Constrained Optimal Control Problems With Control On The Acceleration. Applications To Kinetic Mean Field Games
Yves Achdou (LJLL)
https://arxiv.org/abs/2510.07332 https:/…

State Constrained Optimal Control Problems With Control On The Acceleration. Applications To Kinetic Mean Field Games
Relying on the careful study of a related problem in the calculus of variations, we study a class of optimal control problems in which the control lies on the acceleration, with state constraints on the position variable. In dimension one, we find explicit formulas in the special case when the running cost is a power of the acceleration (in absolute value) and the terminal cost is zero. For more general costs or/and higher dimensions, we study the singularities of the value function. We also pr…