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We prove that the moduli spaces of n-pointed m-stable curves introduced in our previous paper have projective coarse moduli. We use the resulting spaces to run an analogue of the Hassett-Keel log minimal model program for the moduli space…

Algebraic Geometry · Mathematics 2010-05-10 David Ishii Smyth

We show that the minimal model program on any smooth projective surface is realized as a variation of the moduli spaces of Bridgeland stable objects in the derived category of coherent sheaves.

Algebraic Geometry · Mathematics 2019-02-20 Yukinobu Toda

The Minimal Model Program offers natural higher-dimensional analogues of stable $n$-pointed curves and maps: stable pairs consisting of a projective variety $X$ of dimension $\ge2$ and a divisor $B$, that should satisfy a few simple…

Algebraic Geometry · Mathematics 2007-05-23 Valery Alexeev

We introduce a sequence of isolated curve singularities, the elliptic m-fold points, and an associated sequence of stability conditions, generalizing the usual definition of Deligne-Mumford stability. For every pair of integers 0<m<n, we…

Algebraic Geometry · Mathematics 2009-05-06 David Ishii Smyth

We develop a moduli theory of algebraic varieties and pairs of non-negative Kodaira dimension. We define stable minimal models and construct their projective coarse moduli spaces under certain natural conditions. This can be applied to a…

Algebraic Geometry · Mathematics 2022-11-22 Caucher Birkar

The minimal model program suggests a compactification of the moduli space of hyperplane arrangements which is a moduli space of stable pairs. Here, a stable pair consists of a scheme X which is a degeneration of projective space and a…

Algebraic Geometry · Mathematics 2007-05-23 Paul Hacking

The aim of this paper is to study all the natural first steps of the minimal model program for the moduli space of stable pointed curves. We prove that they admit a modular interpretation and we study their geometric properties. As a…

Algebraic Geometry · Mathematics 2023-03-21 Giulio Codogni , Luca Tasin , Filippo Viviani

We construct a moduli space of stable projective pairs with a nontrivial action of a connected reductive group. These stable reductive pairs are higher-dimensional analogs of stable n-pointed curves and generalize to the non-commutative…

Algebraic Geometry · Mathematics 2007-05-23 Valery Alexeev , Michel Brion

The aim of this paper is to study some modular contractions of the moduli space of stable pointed curves. These new moduli spaces, which are modular compactifications of the moduli space of smooth pointed curves, are related with the…

Algebraic Geometry · Mathematics 2023-01-18 Giulio Codogni , Luca Tasin , Filippo Viviani

We study compact stable embedded minimal surfaces whose boundary is given by two collections of closed smooth Jordan curves in close planes of Euclidean 3-space. Our main result is a classification of these minimal surfaces, under certain…

Differential Geometry · Mathematics 2007-05-23 Rosanna Pearlstein

The moduli space of slope-stable vector bundles on a normal projective variety over an algebraically closed field of characteristic $p\geq 0$ is stratified with respect to the decomposition type. On a smooth projective curve of genus at…

Algebraic Geometry · Mathematics 2023-08-15 Dario Weissmann

We prove an existence theorem for good moduli spaces, and use it to construct the second flip in the log minimal model program for the moduli space of stable curves. In fact, our methods give a uniform, self-contained construction of the…

Algebraic Geometry · Mathematics 2014-10-07 Jarod Alper , Maksym Fedorchuk , David Ishii Smyth , Frederick van der Wyck

In this paper, we completely work out the log minimal model program for the moduli space of stable curves of genus three. We employ a rational multiple $\alpha\delta$ of the divisor $\delta$ of singular curves as the boundary divisor,…

Algebraic Geometry · Mathematics 2007-05-23 Donghoon Hyeon , Yongnam Lee

We establish a homotopy-theoretic description of the homology of stable moduli spaces of $(2n+1)$-dimensional manifold triads $(N, \partial^h N, \partial^v N)$ with fixed $\partial^v N$, whenever $n \geq 3$ and $(N, \partial^h N)$ is…

Algebraic Topology · Mathematics 2025-10-22 João Lobo Fernandes

We give a sufficient condition under which the moduli space of morphisms between logarithmic schemes is quasifinite under the moduli space of morphisms between the underlying schemes. This implies that the moduli space of stable maps from…

Algebraic Geometry · Mathematics 2016-01-13 Jonathan Wise

We study the moduli space of a product of stable varieties over the field of complex numbers, as defined via the minimal model program. Our main results are: (a) taking products gives a well-defined morphism from the product of moduli…

Algebraic Geometry · Mathematics 2019-02-20 Bhargav Bhatt , Wei Ho , Zsolt Patakfalvi , Christian Schnell

We prove that any non-commutative smooth projective variety with a Bridgeland stability condition of dimension less than $\frac{6}{5}$ must be a smooth projective curve. As a consequence, we deduce the non-existence of such categories with…

Algebraic Geometry · Mathematics 2022-10-18 Benjamin Sung

We construct a moduli space of stable pairs over a smooth projective variety, parametrizing morphisms from a fixed coherent sheaf to a varying sheaf of fixed topological type, subject to a stability condition. This generalizes the notion…

Algebraic Geometry · Mathematics 2018-03-16 Yinbang Lin

In this mostly expository paper we review several known results about the cohomology of moduli spaces of smooth and stable curves, focusing in particular on low degree cohomology. We also give a new proof of Harer's theorem describing the…

Algebraic Geometry · Mathematics 2008-12-19 Enrico Arbarello , Maurizio Cornalba

A moduli space of stable quotients of the rank n trivial sheaf on stable curves is introduced. Over nonsingular curves, the moduli space is Grothendieck's Quot scheme. Over nodal curves, a relative construction is made to keep the torsion…

Algebraic Geometry · Mathematics 2014-11-11 A. Marian , D. Oprea , R. Pandharipande
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