Update seminar.md

seminar.md

@@ -58,7 +58,7 @@ and a mattermost channel for chat. To join the mattermost channel:
 |Date|Speaker|Title/Topic|
 |----|-------|-----------|
 |?| Dennis Müller/Michael Kohlhase | sTeX 3 – Semantic LaTeX Reimagined |
-|2022-02-07| Deyan Ginev | ? (something about ar5iv) |
+|2022-02-07| Deyan Ginev | ar5iv.org – a new preview platform for the arXMLiv dataset |
 |2022-01-10| Abdou Youssef | Machine Learning for Math: Vision and Intermediate Milestones ([slides](/public/slides/2022-01-10-youssef.pdf), [recording](https://www.fau.tv/clip/id/39854)) |