Representation type of surfaces in $\mathbb{P}^3$

Edoardo Ballico; Sukmoon Huh

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arXiv · 1807.08916

Representation type of surfaces in $\mathbb{P}^3$

Edoardo Ballico·Sukmoon Huh

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Abstract

The goal of this article is to prove that every surface with a regular point in the three-dimensional projective space of degree at least four, is of wild representation type under the condition that either $X$ is integral or $\mathrm{Pic}(X) \cong \langle \Oo_X(1) \rangle$; we construct families of arbitrarily large dimension of indecomposable pairwise non-isomorphic aCM vector bundles. On the other hand, we prove that every non-integral aCM scheme of arbitrary dimension at least two, is also very wild in a sense that there exist arbitrarily large dimensional families of pairwise non-isomorphic aCM non-locally free sheaves of rank one.

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Edoardo Ballico, Sukmoon Huh. 2018-07-24. Representation type of surfaces in $\mathbb{P}^3$. https://arxiv.org/abs/1807.08916

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