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2016 Fiscal Year Final Research Report

A study of complex surface singularities with rational homology sphere link

Research Project

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Project/Area Number 26400064
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geometry
Research InstitutionYamagata University

Principal Investigator

Okuma Tomohiro  山形大学, 理学部, 教授 (00300533)

Co-Investigator(Renkei-kenkyūsha) TOMARU TADASHI  群馬大学, 名誉教授 (70132579)
Research Collaborator Nemethi Andras  
Project Period (FY) 2014-04-01 – 2017-03-31
Keywords2次元特異点 / 幾何種数
Outline of Final Research Achievements

Giving an explicit topological type of a normal surface singularity with homology sphere link, we determined the all possible values of the geometric genus, the multiplicity, and the embedding dimension, and also obtained the complex structures with maximal geometric genus (joint work with Professor A. Nemethi). For general surface singularities, we gave several characterizations of pg-ideals and an explicit expression for the core of pg-ideals, and proved the existence of good ideals and a new characterization of rational surface singularities via core (joint work with Professor Kei-ichi Watanabe and Professor Ken-ichi Yoshida). We also determined the all possible dimension of cohomology of ideal sheaves given by cycles for elliptic singularities.

Free Research Field

複素特異点論

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Published: 2018-03-22  

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