Tootfinder

Developers of invasive visual prostheses for the blind (brain implants, retinal implants) try to protect their turf by ignoring noninvasive alternatives based on smart glasses, using outdated and restrictive definitions, from ivory towers https://www.youtube.com/watch?v=PewuFviiSsQ

Nein, ich nehme keine Retinolcreme gegen Hautalterung. Völlig absurd. Und auch in Zukunft nicht. Alter sieht man halt.

$p$-retract Rationality and Norm One Tori
Kazuki Sato
https://arxiv.org/abs/2510.10027 https://arxiv.org/pdf/2510.10027

$p$-retract Rationality and Norm One Tori
We study whether the norm one torus associated with a finite separable non-Galois field extension $K/k$ is $p$-retract rational over $k$ for a prime $p$, focusing on the case where the Galois group of the Galois closure of $K/k$ is either the symmetric or the alternating group.