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In mathematics, a Hirzebruch surface is a ruled surface over the projective line. They were studied by . ==Definition== The Hirzebruch surface Σn is the P1 bundle over P1 associated to the sheaf : The notation here means: O(''n'') is the ''n''-th tensor power of the Serre twist sheaf O(1), the invertible sheaf or line bundle with associated Cartier divisor a single point. The surface Σ0 is isomorphic to P1×P1, and Σ1 is isomorphic to P2 blown up at a point so is not minimal. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Hirzebruch surface」の詳細全文を読む スポンサード リンク
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