Multifractional theories: An updated review

The status of multifractional theories is reviewed using comparative tables. Theoretical foundations, classical matter and gravity dynamics, cosmology and experimental constraints are summarized and the application of the multifractional paradigm to quantum gravity is discussed. We also clarify the issue of unitarity in theories with integer-order derivatives.

Automated summary

The review discusses the current status of multifractional theories, providing comparative tables for theoretical foundations, classical matter and gravity dynamics, cosmology, and experimental constraints. The application of the multifractional paradigm to quantum gravity is examined, along with clarification of unitarity in theories with integer-order derivatives.