Tootfinder

Kiel Munition Clearance Week: Warum Munition aus dem Meer entfernt werden muss
Nord- und Ostsee sind stark mit Munition belastet. Experten suchen auf der Munition Clearance Week in Kiel nach Lösungen, die Altlasten möglichst zu entfernen.

Distinguishing symmetric digraphs by proper arc-colourings of type I
Rafa{\l} Kalinowski, Monika Pil\'sniak, Magdalena Prorok
https://arxiv.org/abs/2506.13979

Distinguishing symmetric digraphs by proper arc-colourings of type I
A symmetric digraph $\overleftrightarrow{G}$ is obtained from a simple graph $G$ by replacing each edge $uv$ with a pair of opposite arcs $\vec{uv}$, $\overrightarrow{vu}$. An arc-colouring $c$ of a digraph $\overleftrightarrow{G}$ is distinguishing if the only automorphism of $\overleftrightarrow{G}$ preserving the colouring $c$ is the identity. Behzad introduced the proper arc-colouring of type I as an arc-colouring such that any two consecutive arcs $\overrightarrow{uv}$, $\overrightarrow{vw…

2025 Harry Smith Prize awarded to œscar Romero-Bšez for landscape genomics work that “sets a new standard”
#science #MolecularEcology #genetics

Just now: we're celebrating 5 years of CLARIN-CH 🇨🇭and the fact that Switzerland is a full member of #CLARIN since beginning of 2025
🎉

#doorsday Clermont-Ferrand 2025 by me

USDA ended contract for food assistance ‘clearinghouse’ required by law, lawsuit claims
https://federalnewsnetwork.com/management/2025/06/usda-ended-contract-for-food-assistance-clearinghouse-required-by-law-lawsuit-claims/

Known as “white” asbestos,
chrysotile asbestos is banned in more than 50 countries
for its link to lung cancer and mesothelioma,
a cancer that forms in the lining of internal organs.
White asbestos, however, has been imported for use in the United States for roofing materials, textiles and cement as well as gaskets, clutches, brake pads and other automotive parts.
It is also used in chlorine manufacturing.
Last year the Environmental Protection Agency, u…

E.P.A. Plans to Reconsider a Ban on Cancer-Causing Asbestos
The Trump administration’s move sets back a decades-long effort to end the use of the material, which is widely banned in other countries.

Short monochromatic odd cycles
Oliver Janzer, Fredy Yip
https://arxiv.org/abs/2506.14910 https://arxiv.org/pdf/2506.14910

Short monochromatic odd cycles
It is easy to see that every $k$-edge-colouring of the complete graph on $2^k+1$ vertices contains a monochromatic odd cycle. In 1973, Erdős and Graham asked to estimate the smallest $L(k)$ such that every $k$-edge-colouring of $K_{2^k+1}$ contains a monochromatic odd cycle of length at most $L(k)$. Recently, Girão and Hunter obtained the first nontrivial upper bound by showing that $L(k)=O(\frac{2^k}{k^{1-o(1)}})$, which improves the trivial bound by a polynomial factor. We obtain an exponen…

Jazzaria – Tilting Saints
#abstract

Some remarks on Folkman graphs for triangles
Eion Mulrenin
https://arxiv.org/abs/2506.14942 https://arxiv.org/pdf/2506.14942

Some remarks on Folkman graphs for triangles
Folkman's theorem asserts the existence of graphs $G$ which are $K_4$-free, but which have the property that every two-coloring of $E(G)$ contains a monochromatic triangle. The quantitative aspects of $f(2,3,4)$, the least $n$ such that there exists an $n$-vertex graph with both properties above, are notoriously difficult; a series of improvements over the span of two decades witnessed the solution to two \$100 Erdős problems, and the current record due to Lange, Radziszowski, and Xu now stand…