标题： 实扭转是2线丛 显示英文标题

标题： Real twistings are 2-line bundles

摘要： 我们构造并研究了在分次李群胚上的超2线丛的双范畴，为(实)K-理论的扭曲几何模型提供了一个统一的框架。 我们的工作核心是将文献中的大量模型作为特例展现出来，其中包括几种捆绑gerbes变体（实/等变/Jandl），Freed-Moore的扭曲群胚扩张，Freed-Hopkins-Teleman的K-理论扭曲，Moutuou的实扭曲，Freed的可逆代数丛，以及Distler-Freed-Moore的orientifold扭曲。 显示英文摘要

摘要： We construct and study a bicategory of super 2-line bundles over graded Lie groupoids, providing a unified framework for geometric models of twistings of (Real) K-theory. The core of our work is to exhibit a wide range of models from the literature as special cases, among them several variants of bundle gerbes (Real/equivariant/Jandl), Freed-Moore's twisted groupoid extensions, Freed-Hopkins-Teleman's K-theory twistings, Moutuou's Real twistings, Freed's invertible algebra bundles, and Distler-Freed-Moore's orientifold twistings.