A Lagrangian sphere which is not a vanishing cycle

• 成果类型: Article
• 署名作者: Greer, Francois
• 署名单位: State University of New York (SUNY) System; Stony Brook University
• 刊物名称: INVENTIONES MATHEMATICAE
• ISSN/ISSBN: 0020-9910
• DOI: 10.1007/s00222-019-00900-6
• 发表日期: 2020
• 页码: 333-343
• 关键词: elliptic-surfaces

摘要

We give examples of Calabi-Yau threefolds containing Lagrangian spheres which are not vanishing cycles of nodal degenerations, answering a question of Donaldson in the negative.