The Multiplicative and Exponential Geometry of Digit Polygons: CRT Decomposition, p-Adic Towers, and the Algebraic Closure of the Shoelace Form

This paper extends the digit polygon framework from addition to multiplication and exponentiation of denominators. For distinct primes p and q coprime to the base, the CRT digit identity decomposes the digit sequence of 1/(pq) exactly in terms of the individual sequences of 1/p and 1/q via the Chinese Remainder Theorem: each digit of 1/(pq) equals a weighted combination of the individual digits plus a CRT overflow correction determined by the modular inverse idempotents. This yields the multiplicative area law — a four-term decomposition of A(pq) into individual extended areas, a cross-area term controlled by the spectral orthogonality theorem of the additive theory, and a CRT overflow defect. Unlike the additive carry defect, the CRT overflow is non-propagating: each correction term depends only on the local residue pair with no positional memory. For prime powers, the paper establishes the p-adic area scaling law A(1/p^n) = pⁿ⁻¹A(1/p) + R_n(p), proves that the normalized area converges to the universal attractor −(b^2−1)/24 along the tower, and characterizes Wieferich primes as polygon anomalies — precisely the primes for which the period fails to lift from 1/p to 1/p^2. The paper establishes that all three algebraic operations (addition, multiplication, exponentiation) converge to the same universal attractor, each through a structurally distinct mechanism: carry propagation, CRT overflow contraction, and p-adic spectral refinement.