Lectures related to Semi-reflexive space

Introduces equivalence classes for decomposing a set into subsets of equivalent elements, defining the quotient set X/~.

Covers the Möbius inversion for posets, defining partially ordered sets and explaining the incidence algebra.

Covers equivalence classes, relations, quotient sets, and functions properties.

Emphasizes the importance of big theory in social sciences when dealing with big data and the need for new conventions in the field.