Complexity theory

Complexity theory may refer to:

Science and technology

 * Computational complexity theory, a field in theoretical computer science and mathematics
 * Complex systems theory, the study of the complexity in context of complex systems
 * Assembly theory, a way of characterizing extraterrestrial molecular complexity to assess the probability of the presence of life

Other uses

 * Complexity economics, the application of complexity theory to economics
 * Complexity theory and organizations, the application of complexity theory to strategy