The cocycle condition for multi-pullbacks of algebras

TL;DR

This paper investigates the cocycle condition's role in ensuring sheaf-like properties of multi-pullbacks of algebras, extending topological gluing concepts to algebraic structures with lattice ideals.

Contribution

It establishes the cocycle condition as both necessary and sufficient for sheaf-like behavior in surjective multi-pullbacks of algebras.

Findings

Cocycle condition guarantees sheaf-like properties.

Necessary and sufficient condition for algebraic gluing.

Application to algebras with distributive lattice ideals.

Abstract

Take finitely many topological spaces and for each pair of these spaces choose a pair of corresponding closed subspaces that are identified by a homeomorpism. We note that this gluing procedure does not guarantee that the building pieces, or the gluings of some pieces, are embedded in the space obtained by putting together all given ingredients. Dually, we show that a certain sufficient condition, called the cocycle condition, is also necessary to guarantee sheaf-like properties of surjective multi-pullbacks of algebras with distributive lattices of ideals.