Expertini Research Research

Browse Research Papers

713+ open-access research outputs.

โœ• Clear
๐Ÿ” germany) ๐Ÿ“‚ Mathematics
Showing 713 results for "germany)" in Mathematics
Mathematics Preprint PDF DOI

Sophie Germain Primes and the Totient of Fibonacci Numbers

Aradhya Goel (Indian Institute of Technology, Kanpur) ยท 2026

We study the set $S(q)$ of residue classes $r$ modulo the Pisano period $\pi(q)$ for which $q \mid \varphi(F_m)$ for every $m \equiv r \pmod{\pi(q)}$. We prove that if $q$ is a Sophie Germain prime anโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

The Kerman-Sawyer trace theorem for product Morrey spaces

Naoya Hatano, Ryota Kawasumi, Hiroki Saito, Hitoshi Tanaka ยท 2026

By using parallel corona decomposition, the Kerman-Sawyer trace inequality is extended from Lebesgue spaces to product Morrey spaces.โ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Puzzle Pieces, Bi-accessibility, and Connectivity of the Julia Set for Generalized Blaschke Products

Melida Carranza Trejo, Monica Moreno Rocha ยท 2026

We study the dynamics of a parametric family of rational functions of odd degree, where each function is a generalized Blaschke product that maps the unit circle onto itself. The action of the Blaschkโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

A priority-driven constructive heuristic for assigning and scheduling spontaneous volunteers in disaster response

Martina Sperling ยท 2026

Large-scale disaster response operations frequently involve spontaneous volunteers who arrive independently at disaster sites and must be coordinated under severe time pressure. Assigning such volunteโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Neural Prime Sieves: Density-Driven Generalization and Empirical Evidence for Hardy-Littlewood Asymptotics

Manik Kakkar ยท 2026

Special prime families (twin, Sophie Germain, safe, cousin, sexy, Chen, and isolated primes) are central objects of analytic number theory, yet no efficiently computable probabilistic filter exists foโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Weak approximations, Diophantine exponents and two-dimensional lattices

Nikolay Moshchevitin ยท 2026

We study properties of Diophantine exponents of lattices and so-called related "weak" uniform approximations introduced in recent papers by Oleg German, in the simplest two-dimensional case. In contraโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

The non-abelian Leopoldt conjecture and equalities of $\mathcal{L}$-invariants

Daniel Barrera Salazar, Andrew Graham, Chris Williams ยท 2026

Let $G$ be a reductive group quasi-split at $p$. Using arguments of Hansen--Thorne, we show that under the non-abelian Leopoldt conjecture (NALC), Hansen's $p$-adic overconvergent cohomology eigenvariโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Antisymmetry of real quadratic singular moduli

Soren Sprehe ยท 2026

We confirm a conjecture of Darmon-Vonk on the antisymmetry of real quadratic singular moduli. The proof relies on a careful analysis of rigid meromorphic cocycles \`a la Darmon-Gehrmann-Lipnowski for โ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Homological methods in rigidity theory using graphs of groups

Joannes Vermant ยท 2026

In recent work, Stokes and Vermant considered graph-of-groups realisations of hypergraphs as a new description of rigidity-theoretic problems. In this paper, we show that the infinitesimal aspects of โ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Arrow pattern avoidance in permutations: structure and enumeration

Kassie Archer, Robert P. Laudone ยท 2026

Arrow patterns were introduced by Berman and Tenner as a generalization of vincular patterns. They observed that arrow patterns have the potential to bridge the divide between a permutation's cycle noโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Madhava's Pi-Series in the Modern Context

Harikrishna VJ, Vittal Rao, Srikrishna Bhat ยท 2026

The $\pi$-series is attributed to Madhava, Gregory and Leibniz based on the chronology of its discovery. While this acknowledges the fact that Madhava of Sangamagrama an Indian mathematician who livedโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Dynamics of Newton's method for odd and even elliptic functions

Adrian Esparza-Amador, Monica Moreno Rocha ยท 2026

We investigate Newton's method applied to any odd or any even elliptic function with an arbitrary period lattice. For any function of this type whose set of poles coincides with its period lattice, weโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Torsion Obstruction for Conclusive Posets

Bekir Dan{i}s, Ismail Alperen Ogut ยท 2026

We give a counterexample to a conjecture made by Cigler, Jerman and Wojciechowski stating that all posets are conclusive. We also provide combinatorial characterizations for conclusiveness of finite pโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

From carbon management strategies to implementation: Modeling and physical simulation of CO2 pipeline infrastructure -- a case study for Germany

Mehrnaz Anvari, Marius Neuwirth, Okan Akca, Luna Lutz, Simon Lukas Bussmann, Tobias Fleiter, Bernhard Klaassen ยท 2026

Carbon capture and storage or utilization (CCUS) will play an important role to achieve climate neutrality in many economies. Pipelines are widely regarded as the most efficient means of CO2 transportโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Rank tests for time-varying covariance matrices observed under noise

Markus Rei{ss}, Lars Winkelmann ยท 2026

We consider a $d$-dimensional continuous martingale $X(t)$ with quadratic variation matrix $\langle X\rangle_t=\int_0^t \Sigma(s)\,ds$ and develop tests for the rank of its spot covariance matrix $\Siโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Large induced forests in planar multigraphs

Mikhail Makarov ยท 2026

For a graph $G$ on $n$ vertices, denote by $a(G)$ the number of vertices in the largest induced forest in $G$. The Albertson-Berman conjecture, which has been open since 1979, states that $a(G) \geq \โ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Pattern expansions of permutation statistics

Ian Cavey, Hugh Dennin, Bridget Eileen Tenner ยท 2026

We study the expansions of permutation statistics in the basis of functions counting occurrences of a fixed pattern in a permutation. We show the finiteness of these pattern expansions for a class of โ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Stratified Pseudobundles and Quantization

Ethan Ross ยท 2026

Geometric Quantization is a term used to describe a wide collection of techniques dating back to the 1960s in the work of Kirillov, Kostant, and Souriau, which take symplectic manifolds and produce coโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Herman Rings: Structure, Dynamics, and Open Problems

Gorachand Chakraborty, Subhasis Ghora, Tarakanta Nayak ยท 2025

The existence of the Herman ring of a function adds interest and complexity to the dynamics of the function. We present a detailed and understandable summary of the core discoveries and recent developโ€ฆ

Read Paper โ†’
Mathematics Preprint PDF DOI

Quantization for Semipositive Adjoint Line Bundles

Yu-Chi Hou ยท 2025

Let $L$ be a big and semipositive line bundle on a complex projective manifold $X$, and let $\theta\in c_1(L)$ be a smooth semipositive representative. In the adjoint setting $H^0(X,L^k\otimes K_X)$, โ€ฆ

Read Paper โ†’
Page 1 of 36 Next โ†’