Notions of Booleanization in Pointfree Topology

Explore the concept of Booleanization in pointfree topology through this 34-minute lecture from the Hausdorff Trimester Program on Types, Sets and Constructions. Delve into the role of Boolean algebras in classical mathematics and Heyting algebras in constructive mathematics, with a focus on their applications in pointfree topology. Examine the properties of Boolean locales, including their relationship to discrete spaces and the challenges they present in intuitionistic mathematics. Investigate Sambin's concept of overlap algebras (o-algebras) as a potential solution to retain the interesting features of Boolean locales while recovering some of their classical properties. Learn about key results in o-algebras, including their overtness, relationship to discrete spaces, and connections to Isbell's density theorem. Gain insights into open problems in the field and explore references for further study on overlap algebras, constructive versions of Boolean algebra, and regular opens.