Paderborn University

works on

density functional theory 1 electronic structure 1 high-performance computing 1 open-source software 1 plane-wave methods 1 pseudopotentials 1

From the 1 of 1.2k papers with an AI index.

output

19942026

most citedQuantum ESPRESSO: a modular and open-source software project for quantum simulations of materials

29.3k citations

Showing 2022 · math.COShow all

4 papers · 2 filters

math.CO2022

Edge-connectivity and pairwise disjoint perfect matchings in regular graphs

Yulai Ma, Davide Mattiolo, Eckhard Steffen +1

For $0 \leq t \leq r$ let $m (t, r)$ be the maximum number $s$ such that every $t$ -edge-connected $r$ -graph has $s$ pairwise disjoint perfect matchings. There are only a few values o…

math.CO2022

Bounds for the chromatic index of signed multigraphs

Eckhard Steffen, Isaak H. Wolf

The paper studies edge-coloring of signed multigraphs and extends classical Theorems of Shannon and König to signed multigraphs. We prove that the chromatic index of a signed multi…

math.CO2022★ 5 cited

Pairwise disjoint perfect matchings in $r$ -edge-connected $r$ -regular graphs

Yulai Ma, Davide Mattiolo, Eckhard Steffen +1

Thomassen [Problem 1 in Factorizing regular graphs, J. Combin. Theory Ser. B, 141 (2020), 343-351] asked whether every $r$ -edge-connected $r$ -regular graph of even order has $r - 2$ …

math.CO2022★ 3 cited

Intersection theorems for finite general linear groups

Alena Ernst, Kai-Uwe Schmidt

A subset $Y$ of the general linear group $GL (n, q)$ is called $t$ -intersecting if $rk (x - y) \leq n - t$ for all $x, y \in Y$ , or equivalently $x$ and $y$ agre…

Edge-connectivity and pairwise disjoint perfect matchings in regular graphs

Bounds for the chromatic index of signed multigraphs

Pairwise disjoint perfect matchings in r-edge-connected r-regular graphs

Intersection theorems for finite general linear groups

Pairwise disjoint perfect matchings in $r$ -edge-connected $r$ -regular graphs