Tootfinder

Although many hoped otherwise, we do not seem to be returning to a world in which the center left and the center right compete over tax rates or budgets. Economic and policy arguments just don’t matter as much to people right now as these deeper cultural divides. That’s why all elections are now existential: Small numbers of voters swinging one way or the next will decide the nature of the state, the future of democracy, the independence of the courts.
https://www.theatlantic.com/ideas/archive/2025/06/existential-election-poland-nationalism/683051/

This https://arxiv.org/abs/2503.19194 has been replaced.
initial toot: https://mastoxiv.page/@a…

Lorenz ratios of diagonal and Hall conductivities in a Dirac electron liquid
The magnetotransport properties of a two-dimensional electron liquid in graphene are analyzed in the hydrodynamic limit under isothermal conditions. It is shown that the Wiedemann-Franz law does not hold in this regime and that the Lorenz ratios constructed from the diagonal and Hall conductivities generally differ from each other. The breakdown of the Wiedemann-Franz law is most pronounced near charge neutrality, where the Lorenz ratio can exceed its nominal universal Sommerfeld value by an or…

On dual-rate consensus under transmission delays
David Umsonst, Mina Ferizbegovic
https://arxiv.org/abs/2506.02840 https://arxiv.org/…

On dual-rate consensus under transmission delays
In this paper, we investigate the problem of dual-rate consensus under transmission delays, where the control updates happen at a faster rate than the measurements being received. We assume that the measurements are delayed by a fixed delay and show that for all delays and rates, the system reaches a consensus if and only if the communication graph of the agents is connected and the control gain is chosen in a specific interval. Based on these results we dive deeper into the convergence propert…

Mechanical Degradation of Unentangled Polymer Melts under Uniaxial Extensional Flow
Mingchao Wang, Stephen Sanderson, Debra J. Searles
https://arxiv.org/abs/2506.03945

Mechanical Degradation of Unentangled Polymer Melts under Uniaxial Extensional Flow
Complex flow fields govern the deformation of polymers in various manufacturing processes. However, high flow rates may trigger reaction events (i.e., bond breaking or undesirable reaction of mechanophores) in raw polymeric materials, leading to the mechanical or functional debasement of manufactured structures. Additionally, it is difficult to fully characterize such molecular-level flow in the laboratory due to time- and length-scale limits. In this study, we perform non-equilibrium molecular…

This https://arxiv.org/abs/2312.02849 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Algorithms for mean-field variational inference via polyhedral optimization in the Wasserstein space
We develop a theory of finite-dimensional polyhedral subsets over the Wasserstein space and optimization of functionals over them via first-order methods. Our main application is to the problem of mean-field variational inference, which seeks to approximate a distribution $π$ over $\mathbb{R}^d$ by a product measure $π^\star$. When $π$ is strongly log-concave and log-smooth, we provide (1) approximation rates certifying that $π^\star$ is close to the minimizer $π^\star_\diamond$ of the KL …