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math.AG2005
Factorial hypersurfaces in P^4 with nodes
Ivan Cheltsov, Jihun Park
We prove that for n= 5, 6, 7, a nodal hypersurface of degree n in P^4 is factorial if it has at most (n-1)^2-1 nodes.
math.AG2005★ 3 cited
Weighted Fano threefold hypersurfaces
Ivan Cheltsov, Jihun Park
We study birational transformations into elliptic fibrations and birational automorphisms of quasismooth anticanonically embedded weighted Fano 3-fold hypersurfaces having terminal…