# Fortnightly links (122)

- Tetrahedron Solutions Finally Proved Decades After Computer Search is a Quanta article about a recent preprint of Kedlaya–Kolpakov–Poonen–Rubinstein on the full classification of tetrahedra with rational angles. The inclusion of this link is also a reminder to anyone reading these fortnightly links, but who are not yet aware of Quanta, that it is a really interesting magazine.
- Michel Brion: Homogeneous varieties under split solvable algebraic groups gives a modern proof of the full and modern proof of Rosenlicht's theorem that any variety which is homogeneous under a split solvable group is of the form $\mathbb{A}^n\times(\mathbb{A}\setminus\{0\})^m$ for (unique) integers $n,m\geq0$. The footnotes in this article alone make it worth the read!
- Nitin Nitsure: My encounter with Seshadri and with the Narasimhan-Seshadri theorem is a nice account of Nitsure's memories of Seshadri, who sadly passed away last year.