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Categorical Torelli theorems: results and open problems. 范畴Torelli定理:结果和开放问题。
IF 1 Q2 MATHEMATICS Pub Date : 2023-01-01 Epub Date: 2022-09-15 DOI: 10.1007/s12215-022-00796-x
Laura Pertusi, Paolo Stellari

We survey some recent results concerning the so called Categorical Torelli problem. This is to say how one can reconstruct a smooth projective variety up to isomorphism, by using the homological properties of special admissible subcategories of the bounded derived category of coherent sheaves of such a variety. The focus is on Enriques surfaces, prime Fano threefolds and cubic fourfolds.

我们调查了最近关于所谓的分类Torelli问题的一些结果。这就是说,如何通过利用光滑射影变种的相干簇的有界派生范畴的特殊可容许子范畴的同调性质,重建光滑射影变种直至同构。重点是Enriques曲面,素数Fano三重和立方四重。
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引用次数: 10
On bianchi identities 论边池身份
IF 1 Q2 MATHEMATICS Pub Date : 2020-05-05 DOI: 10.1007/BF02871653
P. Delanoé
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引用次数: 9
Lung Stereotactic Body Radiation Therapy (SBRT) dose gradient and PTV volume: a retrospective multi-center analysis. 肺立体定向体外放射治疗(SBRT)剂量梯度和 PTV 容积:多中心回顾性分析。
IF 3.3 Q2 MATHEMATICS Pub Date : 2019-09-03 DOI: 10.1186/s13014-019-1334-9
David Hoffman, Irena Dragojević, Jeremy Hoisak, David Hoopes, Ryan Manger

Background: The treatment of lung lesions with stereotactic body radiation therapy calls for highly conformal dose, which is evaluated by a number of metrics. Lung stereotactic body radiation therapy clinical trials constrain a plans gradient index. The purpose of this work is to describe the dependence of clinically achievable dose gradient on planning target volume.

Methods: Three hundred seventy-four lung stereotactic body radiation therapy treatment plans were retrospectively reviewed and selected for this study. The relationship between R50% and planning target volume size was observed and compared against the RTOG 0915 and 0813 constraints noting minor and major deviations. Then a least squares regression was used to determine the coefficients for a power functional form of the dependence of gradient measure (GM) on planning target volume size.

Results: Of the 317 peripheral lung SBRT plans, 142 exhibited no deviation, 135 exhibited a minor deviation, and 40 exhibited a major deviation according to the RTOG 0915 dosimetric. conformality and dose fall-off constraints. A plot of gradient measure versus planning target volume size for peripheral lesions, excluding RTOG 0915 major deviations, is fit with an power function of GM = 0.564 V0.215.

Conclusions: Using the PTV size and GM relationship we have characterized, treatment plans with PTV < 85 cm3 can be evaluated subjectively to our previously plans, and given a percentile GM. This relationship and evaluation is useful for volumetric modulated arc therapy lung stereotactic body radiation therapy treatment planning and quality control.

背景:采用立体定向体放射治疗肺部病变需要高度适形的剂量,这需要通过一系列指标来评估。肺部立体定向体放射治疗临床试验对计划梯度指数进行了约束。这项工作的目的是描述临床可实现的剂量梯度与计划靶体积的关系:本研究对 374 份肺立体定向体放射治疗计划进行了回顾性审查和筛选。研究人员观察了R50%与计划靶体积大小之间的关系,并与RTOG 0915和0813约束条件进行了比较,注意到了微小和重大偏差。然后使用最小二乘回归法确定梯度测量(GM)与计划目标容积大小的幂函数形式的系数:结果:在317例外周肺SBRT计划中,根据RTOG 0915剂量学、保形性和剂量衰减约束条件,142例未出现偏差,135例出现轻微偏差,40例出现严重偏差。外周病灶的梯度测量与规划靶体积大小的关系图(不包括 RTOG 0915 主要偏差)与 GM = 0.564 V0.215 的幂函数拟合:利用我们所描述的 PTV 大小与 GM 的关系,可以对 PTV 3 的治疗计划与我们之前的计划进行主观评估,并给出 GM 百分位数。这种关系和评估对于容积调控弧治疗肺立体定向体放射治疗的治疗计划和质量控制非常有用。
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引用次数: 0
Functional derivatives 功能性衍生物
IF 1 Q2 MATHEMATICS Pub Date : 2019-08-15 DOI: 10.1007/BF02844029
E. Allgower
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引用次数: 2
The locus of curves with $$D_n$$Dn-symmetry inside $$mathfrak M_g$$Mg 在$$mathfrak M_g$$ Mg内具有$$D_n$$ dn -对称的曲线轨迹
IF 1 Q2 MATHEMATICS Pub Date : 2016-04-01 DOI: 10.1007/S12215-015-0216-8
Binru Li, Sascha Weigl
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引用次数: 2
A procedure for the construction of non-stationary Riccati-type flows for incompressible 3D Navier–Stokes equations 不可压缩三维Navier-Stokes方程非平稳riccti型流动的构造程序
IF 1 Q2 MATHEMATICS Pub Date : 2016-02-01 DOI: 10.1007/s12215-015-0219-5
S. Ershkov
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引用次数: 31
Local MV -Algebras 局部MV -代数
IF 1 Q2 MATHEMATICS Pub Date : 2016-01-01 DOI: 10.1007/978-3-319-30406-9_5
A. Nola, R. Grigolia, E. Turunen
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引用次数: 20
Torsion units for a Ree group, Tits group and a Steinberg triality group Ree群、Tits群和Steinberg triality群的扭转单位
IF 1 Q2 MATHEMATICS Pub Date : 2015-12-28 DOI: 10.1007/s12215-015-0225-7
J. Gildea
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引用次数: 0
Logarithmic Bloch spaces and their weighted composition operators 对数Bloch空间及其加权复合算子
IF 1 Q2 MATHEMATICS Pub Date : 2015-12-15 DOI: 10.1007/s12215-015-0226-6
J. Ramos-Fernández
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引用次数: 6
Second order monotonicities and second order variational-like inequality problems 二阶单调性与二阶类变分不等式问题
IF 1 Q2 MATHEMATICS Pub Date : 2015-12-11 DOI: 10.1007/s12215-015-0224-8
Sarita Choudhury, Anurag Jayswal, I. Ahmad
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引用次数: 0
期刊
Rendiconti del Circolo Matematico di Palermo
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