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19912026
Showing 2021 · math.AGShow all

8 papers · 2 filters

math.AG2021★ 6 cited

Boundedness of elliptic Calabi-Yau threefolds

Stefano Filipazzi, Christopher D. Hacon, Roberto Svaldi

We show that elliptic Calabi--Yau threefolds form a bounded family. We also show that the same result holds for minimal terminal threefolds of Kodaira dimension 2, upon fixing the…

math.AG2021

Residual finiteness for central extensions of lattices in and negatively curved projective varieties

Matthew Stover, Domingo Toledo

We study residual finiteness for cyclic central extensions of cocompact arithmetic lattices simple type. We prove that the preimage of in any connected co…

math.AG2021★ 3 cited

Hodge numbers are not derived invariants in positive characteristic

Nicolas Addington, Daniel Bragg

We study a pair of Calabi-Yau threefolds X and M, fibered in non-principally polarized Abelian surfaces and their duals, and an equivalence D^b(X) = D^b(M), building on work of Gro…

math.AG2021★ 1 cited

Residually finite lattices in and fundamental groups of smooth projective surfaces

Matthew Stover, Domingo Toledo

This paper studies residual finiteness of lattices in the universal cover of and applications to the existence of smooth projective varieties with fundamental gr…

math.AG2021★ 10 cited

Shokurov's conjecture on conic bundles with canonical singularities

Jingjun Han, Chen Jiang, Yujie Luo

A conic bundle is a contraction between normal varieties of relative dimension such that is relatively ample. We prove a conjecture of Shokurov which predicts t…

math.AG2021★ 8 cited

Birational automorphism groups and the movable cone theorem for Calabi-Yau complete intersections of products of projective spaces

José Ignacio Yáñez

For a Calabi-Yau manifold , the Kawamata - Morrison movable cone conjecture connects the convex geometry of the movable cone to the birational autom…

math.AG2021★ 16 cited

The existence of the Kähler-Ricci soliton degeneration

Harold Blum, Yuchen Liu, Chenyang Xu +1

We prove an algebraic version of the Hamilton-Tian Conjecture for all log Fano pairs. More precisely, we show that any log Fano pair admits a canonical two-step degeneration to a r…

math.AG2021

RandomPoints package for Macaulay2

Sankhaneel Bisui, Zhan Jiang, Sarasij Maitra +2

We present {\tt RandomPoints}, a package in \emph{Macaulay2} designed mainly to identify rational and geometric points in a variety over a finite field. We provide tools to estimat…