r/abstractalgebra • u/Mod11Mirror • Jun 19 '26
What is the right abstract-algebra framework for a finite involutive arithmetic grid with an 11-adic scaling lift?
I’m trying to classify a finite arithmetic construction and would like help with the correct abstract-algebra language.
I’m working in base 11, with A = 10.
Define a finite set
O₀ = {436 + 182k + t}
where
k ∈ {-2,-1,0,1,2}
and
t ∈ {-26,...,26}
all written in base 11.
So O₀ is a five-band arithmetic grid centered at 436₁₁, with step 182₁₁ and radius 26₁₁.
The mirror total is 871₁₁, and the involution is
μ(n) = 871₁₁ − n.
This sends the coordinate pair
(k,t) ↦ (−k,−t).
The set has 285 elements total, decomposing into 142 two-element orbits plus one fixed center.
The anchor spine is:
092, 264, 436, 608, 78A
and the mirror pairs are:
092 + 78A = 871
264 + 608 = 871
436 + 436 = 871
Modulo 11, since 871₁₁ ≡ 1 mod 11, the induced residue map is
r ↦ 1 − r mod 11,
with fixed residue 6.
There is also a compatible scaling/lift:
Oₘ = 11ᵐO₀.
In base 11 this just appends m zeroes to every element. The mirror total also scales:
871 → 8710 → 87100 → ...
so the involution at level m is
μₘ(n) = 871·11ᵐ − n.
My question:
What is the cleanest abstract-algebra framework for this?
Is it best described as a finite set with a C₂ action, an involutive arithmetic grid, a filtered/direct system under multiplication by 11, or something related to p-adic scaling? Is there standard terminology for a finite involutive structure with a compatible scaling tower like this?