Аннотация:
We classify all $1$-nodal degenerations of smooth Fano threefolds with Picard number $1$ (both non-factorial and factorial) and describe their geometry. In particular, we describe a relation between such degenerations and smooth Fano threefolds of higher Picard rank and with unprojections of complete intersection varieties.
Образец цитирования:
A. G. Kuznetsov, Yu. G. Prokhorov, “$1$-nodal Fano threefolds with Picard number $1$”, Изв. РАН. Сер. матем., 89:3 (2025), 80–178; Izv. Math., 89:3 (2025), 495–594