Linkage

arXiv imposes a new limit of two submissions per submitter per month (\(\mathbb{M}\)). Book of Shapes: A collection of minimal, generative and customizable SVG-patterns (\(\mathbb{M}\), via). Sham scientific societies are misleading star researchers, according to Nature (\(\mathbb{M}\), via). The \(13\times 13\) zebra graph is untraceable (\(\mathbb{M}\)). A zebra is a fairy chess piece that jumps like a longer knight, two steps in one direction and three in another. Almost a proof without words that the graph of its moves on a \(13\times 13\) chessboard has no Hamiltonian path. The Harvard/Smithsonian Astrophysics Data System, a large bibliographic database for astronomy, astrophysics, and related fields, has been transitioning for the last year or so to become SciX with expanded areas of coverage “across space, Earth, and planetary sciences”, and is scheduled to complete the move in mid-November (\(\mathbb{M}\)). It’s difficult to find much about the move from adsabs to SciX that…