Conics on Barth--Bauer octics

Abstract

We analyze the configurations of conics and lines on a special class of Kummer octic surfaces. In particular, we bound the number of conics by $176$ and show that there is a unique surface with $176$ conics, all irreducible: it admits a faithful action of one of the Mukai groups. Therefore, we also discuss conics and lines on Mukai surfaces: we discover a double plane (ramified at a smooth sextic curve) that contains $8910$ smooth conics.

Version accepted for publication in SCIENCE CHINA Mathematics

References in corpus (2)

• 800 conics in a smooth quartic surface
• Conics in sextic $K3$-surfaces in ${\mathbb{P}}^4$