nLab constructible sheaf




A sheaf on an étale site is constructible if its restriction to a suitable decomposition into constructible subsets is a locally constant sheaf.


Original articles include

  • Pierre Deligne, La conjecture de Weil. II. Inst. Hautes ´Etudes Sci. Publ. Math., (52):137–252, 1980.

  • Torsten Ekedahl, On the adic formalism. In The Grothendieck Festschrift, Vol. II, volume 87 of Progr. Math., pages 197–218. Birkhäuser Boston, Boston, MA, 1990.

  • Alexander Beilinson, Constructible sheaves are holonomic, Selecta Mathematica 22 (2016) 1797-1819; a slightly updated version (with respect to the published one) is at arxiv/1505.06768

An introductory survey is in

  • Florian Klein, Gerrit Begher, Constructible Sheaves and their derived category (pdf)

A list of relevant definitions and facts is at

and with more on chain complexes of sheaves and abelian sheaf cohomology in

with an eye towards the application in l-adic cohomology/the pro-étale topos.

See also

Last revised on February 5, 2021 at 00:43:36. See the history of this page for a list of all contributions to it.