This paper concerns representations of the integral general linear group. The extension groups Ext² between any pair of hook Weyl modules are determined via a detailed study of cyclic generators and relations associated to certain extensions. As a corollary, the modular extension groups Ext¹ between such modules are determined.

中文翻译：

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挂钩Weyl模块之间的集成Ext 2

本文涉及积分一般线性群的表示。通过对循环生成器和与某些扩展相关的关系的详细研究，可以确定任何一对钩Weyl模块之间的扩展组Ext ²。因此，确定了这些模块之间的模块化扩展组Ext ¹。