Tootfinder

DJI Osmo Action 6: Actionkamera mit variabler Blende
Die Actioncam DJI Osmo Action 6 kommt mit einem 1/1,1-Zoll-Quadratsensor, der hohe Bildqualität verspricht. Die Blende lässt sich von f/2,0 – f/4,0 variieren.
https:/…

Decay of Chebyshev coefficients and error estimates of associated quadrature on shrinking intervals
Krishna Yamanappa Poojara, Sabhrant Sachan, Ambuj Pandey
https://arxiv.org/abs/2509.14602

Decay of Chebyshev coefficients and error estimates of associated quadrature on shrinking intervals
We analyze decay of Chebyshev coefficients and local Chebyshev approximations for functions of finite regularity on finite intervals, focusing on the framework where the interval length tends to zero while the number of approximation nodes remains fixed. For all four families of Chebyshev polynomials, we derive error estimates that quantify the dependence on the interval length for (i) the decay of Chebyshev coefficients, (ii) the approximation error between continuous and discrete Chebyshev co…

On the quadratic complexity of subsets of $\mathbb{F}_p^n$ of bounded $\mathrm{VC_{2}}$-dimension
C. Terry, J. Wolf
https://arxiv.org/abs/2510.12767 https://

On the quadratic complexity of subsets of $\mathbb{F}_p^n$ of bounded $\mathrm{VC_{2}}$-dimension
In prior work, we showed that subsets of $\mathbb{F}_{p}^{n}$ of $\mathrm{VC_{2}}$-dimension at most $k$ are well approximated by a union of atoms of a quadratic factor of complexity $(\ell,q)$, where the complexity $\ell$ of the linear part and the complexity $q$ of the quadratic part are both bounded in terms of $k$, $p$, and the desired level of approximation $μ$. A key tool in the proof of this result was an arithmetic regularity lemma for the Gowers $U^3$-norm by Green and Tao, which resu…

On the Walsh spectra of quadratic APN functions
Sophie Hannah B\'en\'eteau, Nicolas Goluboff, Lukas K\"olsch, Divyesh Vaghasiya
https://arxiv.org/abs/2510.12008 htt…

On the Walsh spectra of quadratic APN functions
APN functions play a central role as building blocks in the design of many block ciphers, serving as optimal functions to resist differential attacks. One of the most important properties of APN functions is their linearity, which is directly related to the Walsh spectrum of the function. In this paper, we establish two novel connections that allow us to derive strong conditions on the Walsh spectra of quadratic APN functions. We prove that the Walsh transform of a quadratic APN function $F$ op…

by accident i stumbled on this review by the #NSA on Bruce Schneiers "Applied Crypto" book from long ago.

QUBOLite: A lightweigth Python toolkit for QUBO
Sascha M\"ucke, Thore Gerlach, Nico Piatkowski, Lukas Thei{\ss}inger
https://arxiv.org/abs/2509.21321 https://

QUBOLite: A lightweigth Python toolkit for QUBO
We present QUBOLite, a Python package for the creation, manipulation, analysis, and solution of Quadratic Unconstrained Binary Optimization (QUBO) instances. Built as a thin wrapper around NumPy arrays, QUBOLite combines efficient numerical operations with high-level abstractions for tasks ranging from instance generation to preprocessing, analysis, and solving strategies, both exact and approximate. The package includes implementations of the QPRO+ algorithm by Glover et al. for identifying st…