Tootfinder

China's state TV broadcaster has revealed details of a new
"graphite bomb"
that can cause a "complete loss of electricity" across an area of 10,000 square meters,
or knock out entire power stations, the South China Morning Post reported.
An animated video released by China's CCTV showed a missile being launched from a ground-based launcher
and then flying to a target where it releases 90 small submunitions.
They then bounce on t…

Video teases new Chinese blackout bomb that can knock out enemy power stations
Animation shared by state broadcaster shows what appears to be graphite bomb designed to disrupt command and control systems.

From i-boxes to signed words
Alessandro Contu, Fan Qin, Qiaoling Wei
https://arxiv.org/abs/2507.06182 https://arxiv.org/pdf/2507.0618…

From i-boxes to signed words
The combinatorics of i-boxes has recently been introduced by Kashiwara--Kim--Oh--Park in the study of cluster algebras arising from the representation theory of quantum affine algebras. In this article, we associate to each chain of i-boxes a signed word, which canonically determines a cluster seed following Berenstein--Fomin--Zelevinsky. By bridging these two different languages, we are able to provide a quick solution to the problem of explicit determining the exchange matrices associated wit…