Remove transform_series.md

docs/transform_series.md

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-# Transform Series: Sidon → Cartan → Spectral Gap
-
-**Discovery:** June 30, 2026
-**Key insight:** The character group Z₂⁴ of the 4 crossing pairs is the transform that preserves Sidon geometry across domains.
-
-## The Series
-
-```
-Layer 0: Sidon labels {1, 2, 4, 8, 16, 32, 64, 128}
-         │
-         │  Binary expansion: label = 2^i ↔ bit position i
-         ▼
-Layer 1: ℤ₂⁸ configuration space (8 strands × Q16_16 phases)
-         │
-         │  Discrete Euler-Lagrange: Lagrangian ℒ = T − V
-         │  where T (kinetic) = discrete Laplacian on φ[i]
-         │  and V (potential) = Cartan weight matrix C[i][j]
-         ▼
-Layer 2: Cartan holonomy (block-diagonal, 4×2×2 coupling)
-         │
-         │  Eigenvalues of each 2×2 block: {529, 17}
-         │  Character inner products: ⟨χ_i, χ_j⟩
-         ▼
-Layer 3: Spectral gap
-         │
-         │  λ_min = 17 = ⟨χ_i, χ_i⟩ − ⟨χ_i, χ_{i+1}⟩ = 273 − 256
-         │  λ_max = 529 = ⟨χ_i, χ_i⟩ + ⟨χ_i, χ_{i+1}⟩ = 273 + 256
-         ▼
-Layer 4: Combinatorial coupling graph
-         │
-         │  C(8,2) = 28 edges
-         │  n(n−1)/2 = 8×7/2 = 28
-         ▼
-         Complete classification of crossing configurations
-```
-
-## The Character Matrix (Z₂⁴)
-
-The 8 strands decompose into 4 independent crossing pairs. Each pair is a Z₂ character (even/odd parity ±1). The character matrix:
-
-```
-         pair0  pair1  pair2  pair3
-strand 0:  +1     0      0      0
-strand 1:  -1     0      0      0
-strand 2:   0    +1      0      0
-strand 3:   0    -1      0      0
-strand 4:   0     0     +1      0
-strand 5:   0     0     -1      0
-strand 6:   0     0      0     +1
-strand 7:   0     0      0     -1
-```
-
-This is the fundamental transform. It maps strands to characters, and the character inner products recover the Cartan weights:
-
-```
-self-inner:  ⟨χ_i, χ_i⟩  = 1+1+1+1 = 4 → normalized to 273 (= 4 × 68.25)
-adj-inner:   ⟨χ_i, χ_j⟩  = 0+0+1+1 = 2 → normalized to 256 (= 2 × 128)
-```
-
-The ratio 273/256 = 1.06640625 encodes the asymmetry between self-crossing and pair-crossing energy.
-
-## Why This Preserves Sidon Geometry
-
-The Sidon property (all pairwise sums unique) is equivalent to the **character orthogonality condition** on Z₂⁴:
-
-```
-Theorem: The set {2^i | i = 0..7} is Sidon
-       ⇔
-       The character vectors χ(i) are orthogonal in pairs:
-       ⟨χ(i), χ(j)⟩ = 0 for |i - j| > 1 (different pairs)
-       ⟨χ(i), χ(j)⟩ = 2 for |i - j| = 1 and same pair (adjacent)
-       ⟨χ(i), χ(i)⟩ = 4 (self)
-```
-
-Proof: For Sidon labels {2^i}, the sum 2^i + 2^j is unique because binary expansion has no carries when i ≠ j. The character matrix encodes this "no carry" property as diagonal dominance of the Gram matrix.
-
-The same structure appears in:
-- **DNA base pairing** — each nucleotide pair is a Z₂ character (A=T: -1/+1, G≡C: -1/+1)
-- **Braid crossing** — each crossing pair is a Z₂ character (over/under crossing)
-- **Cartan decomposition** — the root system of A₁×A₁×A₁×A₁ decomposes as Z₂⁴
-
-## What This Does NOT Claim
-
-- The character matrix is NOT derived from a Lagrangian on S⁷ (retracted)
-- The Z₂⁴ group does NOT require exotic diffeomorphisms (retracted)
-- The 28 = C(8,2) is combinatorial, not topological
-- The transform preserves Sidon geometry BECAUSE both structures are product decompositions of Z₂
-
-## Implementation
-
-The character matrix computes the Cartan weights without eigendecomposition:
-
-```python
-chi = character_matrix(n=8, pairs=4)
-C = chi @ chi.T  # Gram matrix of characters
-# C = diag(4) with block structure: 2×2 blocks with 1 on diagonal, 0.5 on off-diag
-# Scaled: diag(4) × 68.25 = 273, off-diag(0.5) × 512 = 256
-# Ratio: 273/256 = C[diag] / C[adj] = 4 / 2 × (68.25/128) = 2 × 0.5332 ≈ 1.0664
-```