1. Overview and roadmap
The formalisation tracks Jacinto and Williams (2023) section by section. The notes
split into two parts: Part I constructs the Kubota–Leopoldt p-adic
L-function and pins down its arithmetic, and Part II develops the Iwasawa
theory needed to relate it to ideal class groups, culminating in the Iwasawa Main
Conjecture. Each paper section becomes a blueprint chapter; the bullet lists below
record the headline result of each, which the chapter then expands into nodes.