Perfectoid Field
Perfectoid fields provide the valued-field setting for tilting. Read the completeness, nondiscreteness, and Frobenius conditions together, then follow the inverse-limit construction of the tilt.
Before opening the references
field · p-adic number field · p-adic additive valuation · Categorical Limit
Where to read
Start here: Perfectoid Spaces
Peter Scholze · Research paper · English · Free full text
Section 3, Definition 3.1 and Lemma 3.4, printed pp. 15–16
Continue from here
Algebraic Geometry in the library · Preparation and skip guidance