Memory zeta

• 2026-09-21 [Proved] The no-zero factor 1/det(I - base^(-s) A) of the memory zeta is the Artin-Mazur zeta of the width-k subshift the rule accepts at z = base^(-s), the product over its primitive periodic orbits, and on a design it is the zeta 1/(1 - fill base^(-s)) of the full shift on fill symbols, the Lyndon product of the zeta page. Witness: Bowen and Lanford 1970, zeta.md Lyndon product bullet, beneath.md THE MEMORY ZETA.