On the Iwasawa theory of Cayley graphs

Abstract

This paper explores Iwasawa theory from a graph theoretic perspective, focusing on the algebraic and combinatorial properties of Cayley graphs. Using representation theory, we analyze Iwasawa-theoretic invariants within ${\mathbb{Z}}_{\ell }$-towers of Cayley graphs, revealing connections between graph theory, number theory, and group theory. Key results include the factorization of associated Iwasawa polynomials and the decomposition of $\mu$- and $\lambda$-invariants. Additionally, we apply these insights to complete graphs, establishing conditions under which these invariants vanish.

Version 2: 23 pages, minor corrections following referee reports. Example 2 added. Accepted for publication in Research in the Mathematical Sciences

References in corpus (1)

• On the distribution of Iwasawa invariants associated to multigraphs