Find 
, the union of sets A and B. 
Definitions:
Segmentary Differentiation
A concept in sociology and anthropology referring to the division and organization of society into hierarchically arranged segments.
Identical Functions
In mathematics or computer science, this term refers to functions that produce the same output for all possible inputs.
Stratificatory Differentiation
involves the division of society into layers or strata based on variables such as wealth, power, and prestige.
Vertical Differentiation
Refers to the process of ranking various products, services, or individuals based on quality or prestige rather than quantity or access.
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