理学部数学科主催/ HiSEP共催 Exotic complex algebraic structures on even dimensional Euclidean spaces,which first arose as a byproduct of a topological characterization of the complex algebraic affine plane due to Ramanujam, have been ubiquitous in affine geometry during the last two decades. After surveying classical instances of “exoticity” in various categories ranging from differentiable real manifolds to complex algebraic varieties, we will consider the existence of exotic algebraic structures on another class of familiar algebraic objects: complex affine spheres, that is, smooth affine quadrics in in the usual complex affine space. We will discuss more particularly certain exotic structures on the affine 3-sphere which arise from principal bundles over the punctured affine plane and show that some of them are analytically isomorphic and stably algebraically isomorphic to the standard one. 平成25年11月20日（水） 16:30～18:00 埼玉大学 理工学研究科棟5F 数学研究室Ⅰ 大学院生を対象としていて専門的なセミナーとなりますが、アファイン変換に興味 のある学部学生の皆さんのご参加をお待ちしております。 主催 埼玉大学理学部数学科 共催 HiSEP実行委員会 お問い合わせ 理学部数学科 岸本崇 E-mail [email protected] HiSEPホームページ http://hisep.saitama-u.ac.jp
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