Unusual functorialities for weakly constructible sheaves

Abstract

We prove that various morphisms related to the six Grothendieck operations on sheaves become isomorphisms when restricted to (weakly) constructible sheaves. To this end, we first study some properties of weakly cohomologically constructible sheaves. We then deduce several compatibilities of the six operations in the context of (weakly) $\mathbb{R}$-constructible sheaves.

13 pages; v2: improved final version, to appear in Pacific Journal of Mathematics