On $K$-stability of $\mathbb{P}^3$ blown up along the disjoint union of a twisted cubic curve and a line

Postulation of disjoint unions of lines and a multiple point, II

We study the postulation of a general union $X\subset \mathbb {P}^3$ of one m-point $mP$ and $t$ disjoint lines. We prove that it has the expected Hilbert function, proving a conjecture by E. Carlini, M. V. Catalisano and A. V. Geramita.

关于有效 Cartier 除子严格变换的一个注记

A Note on the Strict Transformation of an Effective Cartier Divisor

本文研究有效 Cartier 除子的严格变换，给出沿覆盖其奇异轨迹的不交光滑子簇爆破后所得空间光滑的充分条件，并在维数条件下构造 Kuznetsov 意义下的弱范畴 crepant 解消。

Configurations of infinitely near points

We present a survey of some aspects and new results on configurations, i.e. disjoint unions of constellations of infinitely near points, local and global theory, with some applications and results on generalized Enriques diagrams, singular foliations, and linear systems defined by clusters.