Tootfinder

The Iranian government says it has restricted internet access in response to Israeli cyberattacks; some Western communication apps have reportedly been blocked (Kevin Collier/NBC News)
https://www.nbcnews.com/tech/internet/iran-pl…

Iran plunged into an internet near-blackout during deepening conflict
Iran plunged into a near-total internet blackout Tuesday as Israel continued to bombard the country

More slides about the 2028 Total #SolarEclipse from Terry Cuttle at the SEC - and about coming attractions down under. Relevant websites: https://eclipse.asa.astronomy.org.au/ and https://www.eclipse.aaq.org.au/ 16/n

The radio properties of quasi-periodic X-ray eruption sources
A. J. Goodwin, R. Arcodia, G. Miniutti, J. C. A Miller-Jones, S. van Velzen
https://arxiv.org/abs/2506.14417

The radio properties of quasi-periodic X-ray eruption sources
Quasi-periodic X-ray eruptions (QPEs) are a new class of repeating nuclear transient in which repeating X-ray flares are observed coming from the nuclei of generally low mass galaxies. Here we present a comprehensive summary of the radio properties of 12 bona-fide quasi-periodic eruption sources, including a mix of known tidal disruption events (TDEs) and AGN-like hosts. We include a combination of new dedicated radio observations and archival/previously published radio observations to compile …

I think a tram is coming from behind.

Positive Geometry of Polytopes and Polypols
Simon Telen
https://arxiv.org/abs/2506.05510 https://arxiv.org/pdf/2506.05510

Positive Geometry of Polytopes and Polypols
These are lecture notes supporting a minicourse taught at the Summer School in Total Positivity and Quantum Field Theory at CMSA Harvard in June 2025. We give an introduction to positive geometries and their canonical forms. We present the original definition by Arkani-Hamed, Bai and Lam, and a more recent definition suggested by work of Brown and Dupont. We compute canonical forms of convex polytopes and of quasi-regular polypols, which are nonlinear generalizations of polygons in the plane. T…

Just spent 7 hours experiencing life sans electricity here in Spain - we're totally fine, but wow the world does not function in very basic ways, and if you don't own a radio you really have zero information or ability to communicate.

Yesterday, for the first time in the modern history of Spain, the whole country was left without electricity and with the communications of the end of the analog era.
Children had to play ball in the parks, families had to have barbecues in the parks and play board games... And I had to read a book. Going back to the 20th century was hell!
#spain

This https://arxiv.org/abs/2504.12885 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csIT_…

Optimizing Movable Antennas in Wideband Multi-User MIMO With Hardware Impairments
Movable antennas represent an emerging field in telecommunication research and a potential approach to achieving higher data rates in multiple-input multiple-output (MIMO) communications when the total number of antennas is limited. Most solutions and analyses to date have been limited to \emph{narrowband} setups. This work complements the prior studies by quantifying the benefit of using movable antennas in \emph{wideband} MIMO communication systems. First, we derive a novel uplink wideband sy…

Mapping the Spatial Distribution of Fast Radio Bursts within their Host Galaxies
Alexa C. Gordon (Northwestern), Wen-fai Fong, Adam T. Deller, Lachlan Marnoch, Sungsoon Lim, Eric W. Peng, Keith W. Bannister, Apurba Bera, N. D. R. Bhat, Tyson Dial, Yuxin Dong, Tarraneh Eftekhari, Marcin Glowacki, Kelly Gourdji, Vivek Gupta, Joscha N. Jahns-Schindler, Akhil Jaini, Charles D. Kilpatrick, Chang Liu, J. Xavier Prochaska, Stuart D. Ryder, Ryan M. Shannon, Sunil Simha, Nicolas Tejos, Yuanming…

Mapping the Spatial Distribution of Fast Radio Bursts within their Host Galaxies
We present deep optical and near-infrared observations of the host galaxies of 34 fast radio bursts (FRBs) detected by the Commensal Real-time ASKAP Fast Transient (CRAFT) survey on the Australian SKA Pathfinder (ASKAP) to compare the locations of FRBs relative to their host light distributions. Incorporating three additional FRBs from the literature, for a total of four repeating and 33 apparently non-repeating FRBs, we determine their projected galactocentric offsets and find a median of $ 4.…

Real Toric Varieties: Interactions between their Geometry and their Topology
Jules Chenal (LPP), Matilde Manzaroli
https://arxiv.org/abs/2506.03745 https:/…

Real Toric Varieties: Interactions between their Geometry and their Topology
In the present article, we investigate the topology of real toric varieties, especially those whose torus is not split over the field of real numbers. We describe some canonical fibrations associated to their real loci. Then, we establish various properties of their cohomology provided that their real loci are compact and smooth. For instance, we compute their Betti numbers, show that their cohomology is totally algebraic, and extend a criterion of orientability. In addition, we provide the top…