# K-theory of large categories

### Alexander I. Efimov

Steklov Mathematical Institute of RAS, Gubkin str. 8, GSP-1, Moscow 119991, Russia, and National Research University Higher School of Economics, Russian Federation

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## Abstract

We give a short overview of a new notion of *continuous* K-theory, which is defined for a certain class of large (enhanced) triangulated categories. For compactly generated triangulated categories, this continuous K-theory gives the usual nonconnective K-theory of the category of compact objects. We formulate a general theorem about the computation of continuous K-theory for the category of sheaves (of modules) on a locally compact Hausdorff space. This result already gives a surprising answer for the category of sheaves on the real line.