English
For any f ∈ PreTilt O p with a nonzero coeff at n, valAux equals a certain power of preVal of that coeff, matching the p-power shift.
Русский
Для любого f ∈ PreTilt O p с ненулевым коэффициентом на позиции n, valAux равен соответствующей степени preVal коэффициента и т.д.
LaTeX
$$$\mathrm{valAux}_K(v,O,p)(f) = \mathrm{ModP.preVal}(K,v,O,p)(\text{coeff}_{n}(f))^{p^n}$, если $\text{coeff}_n(f) \neq 0$$$
Lean4
/-- Perfection of `O/(p)` where `O` is the ring of integers of `K`. -/
def PreTilt :=
Ring.Perfection (ModP O p) p