Zeta function regularization

Zeta function regularization is a mathematical technique used to assign values to certain divergent series or integrals that are typically undefined in the classical sense. This technique involves the use of the Riemann zeta function and related functions to provide a meaningful interpretation of these divergent expressions. ### Key Concepts 1. **Divergent Series**: Many series or integrals encountered in quantum field theory, number theory, or statistical mechanics can diverge.