Zobrazeno 1 - 10
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pro vyhledávání: '"Lorenzo, Andrea"'
Autor:
Battistella, Luca, Di Lorenzo, Andrea
We compute the integral Chow rings of $\overline{\mathcal M}_{1,n}$ for $n=3,4$. For $n\leq 6$, these stacks can be obtained by a sequence of weighted blow-ups and blow-downs from a simple stack, either a weighted projective space or a Grassmannian.
Externí odkaz:
http://arxiv.org/abs/2402.14644
Autor:
Di Lorenzo, Andrea, Pirisi, Roberto
We compute the $\ell$-primary torsion of the Brauer group of the moduli stack of smooth curves of genus three over any field of characteristic different from two. We achieve this result by computing the cohomological invariants of this stack. Along t
Externí odkaz:
http://arxiv.org/abs/2402.06620
Autor:
Arena, Veronica, Di Lorenzo, Andrea, Inchiostro, Giovanni, Mathur, Siddharth, Obinna, Stephen, Pernice, Michele
We establish a criterion for determining when a smooth Deligne-Mumford stack is a weighted blow-up. More precisely, given a smooth Deligne-Mumford stack $\mathcal{X}$ and a Cartier divisor $\mathcal{E} \subset \mathcal{X}$ such that (1) $\mathcal{E}$
Externí odkaz:
http://arxiv.org/abs/2310.15076
We compute the integral Picard group of the moduli stack of polarized K3 surfaces of fixed degree whose singularities are at most rational double points. We also compute the integral Picard group of the stack of quasi-polarized K3 surfaces, and of th
Externí odkaz:
http://arxiv.org/abs/2305.07574
We give a valuative criterion for when a smooth algebraic stack with a separated good moduli space is the quotient of a separated Deligne-Mumford stack by a torus. For doing so, we introduce a new class of morphisms, the so-called effective morphisms
Externí odkaz:
http://arxiv.org/abs/2303.10751
We give a definition of twisted map to a quotient stack with projective good moduli space, and we show that the resulting functor satisfies the existence part of the valuative criterion for properness.
Comment: 28 pages, comments very welcome! V
Comment: 28 pages, comments very welcome! V
Externí odkaz:
http://arxiv.org/abs/2210.03806
Autor:
Di Lorenzo, Andrea, Pirisi, Roberto
We introduce a theory of cohomological invariants with mod $p^r$ coefficients for algebraic stacks in characteristic $p$. Using these new tools we complete the computation of the Brauer group and cohomological invariants of the stack of elliptic curv
Externí odkaz:
http://arxiv.org/abs/2207.08792
We compute the Chow rings with integral coefficients of moduli stacks of minimal Weierstrass fibrations over the projective line. For each integer $N\geq 1$, there is a moduli stack $\mathcal{W}^{\mathrm{min}}_N$ parametrizing minimal Weierstrass fib
Externí odkaz:
http://arxiv.org/abs/2204.05524
Emotion recognition in children can help the early identification of, and intervention on, psychological complications that arise in stressful situations such as cancer treatment. Though deep learning models are increasingly being adopted, data scarc
Externí odkaz:
http://arxiv.org/abs/2202.05187
Publikováno v:
In IJC Heart & Vasculature August 2024 53