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
See also
- Computational complexity
- Complexity (disambiguation)
- Systems theory
- Systems thinking
- Complex adaptive system, a special case of complex systems
- Complex network