64 citations · 86 across the 12 of their papers we have counts for
9 papers · 1 filter
Calabi-Yau threefolds with non-Gorenstein involutions
Nam-Hoon Lee
The concept of non-Gorenstein involutions on Calabi-Yau threefolds is a higher dimensional generalization of non-symplectic involutions on surfaces. We present some elementary…
An example of non-Kähler Calabi-Yau fourfold
Nam-Hoon Lee
We show that there exists a non-Kähler Calabi-Yau fourfold, constructing an example by smoothing a normal crossing variety.
-semistable Calabi--Yau threefolds of Type III
Nam-Hoon Lee
We develop some methods to construct normal crossing varieties whose dual complexes are two-dimensional, which are smoothable to Calabi--Yau threefolds. We calculate topological in…
Mirror pairs of Calabi-Yau threefolds from mirror pairs of quasi-Fano threefolds
Nam-Hoon Lee
We present a new construction of mirror pairs of Calabi-Yau manifolds by smoothing normal crossing varieties, consisting of two quasi-Fano manifolds. We introduce a notion of mirro…
Calabi-Yau double coverings of Fano-Enriques threefolds
Nam-Hoon Lee
This note is a report on the observation that the Enriques-Fano threefolds with terminal cyclic quotient singularities admit Calabi-Yau threefolds as their double coverings. We cal…
A type of the Lefschetz hyperplane section theorem on \Q-Fano 3-folds with Picard number one and -singularities
Nam-Hoon Lee
We prove a type of the Lefschetz hyperplane section theorem on Q-Fano 3-folds with Picard number one and -singularities by using some degeneration method. As a byproduc…