7.8 KiB
WORKSHEET G3 — Eigensolid Fixed Point
Verifiable with any calculator. No English inside formulas.
PART A: The Crossing Operator C (applied numerically)
INPUT: p = (0.3, 0.1, 0.15, 0.05, 0.2, 0.08, 0.07, 0.05) Check: 0.3+0.1+0.15+0.05+0.2+0.08+0.07+0.05 = 1.0 ✓
FORMULA:
C(p)₁ = C(p)₂ = (p₁ + p₂) / 2
C(p)₃ = C(p)₄ = (p₃ + p₄) / 2
C(p)₅ = C(p)₆ = (p₅ + p₆) / 2
C(p)₇ = C(p)₈ = (p₇ + p₈) / 2
WORK:
C(p)₁ = C(p)₂ = (0.3 + 0.1) / 2 = 0.4 / 2 = 0.2
C(p)₃ = C(p)₄ = (0.15 + 0.05) / 2 = 0.2 / 2 = 0.1
C(p)₅ = C(p)₆ = (0.2 + 0.08) / 2 = 0.28 / 2 = 0.14
C(p)₇ = C(p)₈ = (0.07 + 0.05) / 2 = 0.12 / 2 = 0.06
OUTPUT: C(p) = (0.2, 0.2, 0.1, 0.1, 0.14, 0.14, 0.06, 0.06)
Check: 0.2+0.2+0.1+0.1+0.14+0.14+0.06+0.06 = 1.0 ✓
PART B: Idempotence C∘C = C (verified numerically)
INPUT: C(p) = (0.2, 0.2, 0.1, 0.1, 0.14, 0.14, 0.06, 0.06)
WORK:
C(C(p))₁ = C(C(p))₂ = (0.2 + 0.2) / 2 = 0.4 / 2 = 0.2
C(C(p))₃ = C(C(p))₄ = (0.1 + 0.1) / 2 = 0.2 / 2 = 0.1
C(C(p))₅ = C(C(p))₆ = (0.14 + 0.14) / 2 = 0.28 / 2 = 0.14
C(C(p))₇ = C(C(p))₈ = (0.06 + 0.06) / 2 = 0.12 / 2 = 0.06
OUTPUT: C(C(p)) = (0.2, 0.2, 0.1, 0.1, 0.14, 0.14, 0.06, 0.06)
VERIFICATION: C(C(p)) = C(p) ✓
RESULT: C∘C = C. One application reaches the fixed point.
PART C: Image M ≅ Δ₃ (verified numerically)
Image M: All vectors with p₁=p₂, p₃=p₄, p₅=p₆, p₇=p₈.
Map from Δ₃ to M:
(q₁, q₂, q₃, q₄) ↦ (q₁/2, q₁/2, q₂/2, q₂/2, q₃/2, q₃/2, q₄/2, q₄/2)
TEST: (q₁, q₂, q₃, q₄) = (0.4, 0.2, 0.28, 0.12) Check: 0.4 + 0.2 + 0.28 + 0.12 = 1.0 ✓
WORK:
φ(q) = (0.4/2, 0.4/2, 0.2/2, 0.2/2, 0.28/2, 0.28/2, 0.12/2, 0.12/2)
= (0.2, 0.2, 0.1, 0.1, 0.14, 0.14, 0.06, 0.06)
OUTPUT: φ(0.4, 0.2, 0.28, 0.12) = (0.2, 0.2, 0.1, 0.1, 0.14, 0.14, 0.06, 0.06)
VERIFICATION: This equals C(p) from Part A. ✓
Inverse map:
ψ(p₁, p₂, ..., p₈) = (2p₁, 2p₃, 2p₅, 2p₇)
TEST: ψ(0.2, 0.2, 0.1, 0.1, 0.14, 0.14, 0.06, 0.06)
= (2×0.2, 2×0.1, 2×0.14, 2×0.06)
= (0.4, 0.2, 0.28, 0.12)
VERIFICATION: ψ(φ(q)) = q ✓ and φ(ψ(C(p))) = C(p) ✓
PART D: Contraction (verified numerically)
INPUT: p = (0.3, 0.1, 0.15, 0.05, 0.2, 0.08, 0.07, 0.05) INPUT: q = (0.2, 0.2, 0.1, 0.1, 0.15, 0.1, 0.1, 0.05)
From Part A: C(p) = (0.2, 0.2, 0.1, 0.1, 0.14, 0.14, 0.06, 0.06)
Compute C(q):
C(q)₁ = C(q)₂ = (0.2 + 0.2) / 2 = 0.2
C(q)₃ = C(q)₄ = (0.1 + 0.1) / 2 = 0.1
C(q)₅ = C(q)₆ = (0.15 + 0.1) / 2 = 0.125
C(q)₇ = C(q)₈ = (0.1 + 0.05) / 2 = 0.075
OUTPUT: C(q) = (0.2, 0.2, 0.1, 0.1, 0.125, 0.125, 0.075, 0.075) Check: 0.2+0.2+0.1+0.1+0.125+0.125+0.075+0.075 = 1.0 ✓
STEP 1: Compute d_F(p, q)
√(p₁q₁) = √(0.3×0.2) = √0.06 = 0.24495
√(p₂q₂) = √(0.1×0.2) = √0.02 = 0.14142
√(p₃q₃) = √(0.15×0.1) = √0.015 = 0.12247
√(p₄q₄) = √(0.05×0.1) = √0.005 = 0.07071
√(p₅q₅) = √(0.2×0.15) = √0.03 = 0.17321
√(p₆q₆) = √(0.08×0.1) = √0.008 = 0.08944
√(p₇q₇) = √(0.07×0.1) = √0.007 = 0.08367
√(p₈q₈) = √(0.05×0.05) = √0.0025= 0.05000
Sum:
S_pq = 0.24495 + 0.14142 + 0.12247 + 0.07071
+ 0.17321 + 0.08944 + 0.08367 + 0.05000
= 0.97587
d_F(p,q) = 2·arccos(0.97587)
Type into calculator: 2 * arccos(0.97587)
STEP 2: Compute d_F(C(p), C(q))
√(C(p)₁·C(q)₁) = √(0.2×0.2) = 0.2
√(C(p)₂·C(q)₂) = √(0.2×0.2) = 0.2
√(C(p)₃·C(q)₃) = √(0.1×0.1) = 0.1
√(C(p)₄·C(q)₄) = √(0.1×0.1) = 0.1
√(C(p)₅·C(q)₅) = √(0.14×0.125) = √0.0175 = 0.13229
√(C(p)₆·C(q)₆) = √(0.14×0.125) = 0.13229
√(C(p)₇·C(q)₇) = √(0.06×0.075) = √0.0045 = 0.06708
√(C(p)₈·C(q)₈) = √(0.06×0.075) = 0.06708
Sum:
S_CpCq = 0.2 + 0.2 + 0.1 + 0.1 + 0.13229 + 0.13229 + 0.06708 + 0.06708
= 0.99874
d_F(C(p), C(q)) = 2·arccos(0.99874)
Type into calculator: 2 * arccos(0.99874)
STEP 3: Compare
| Value | Calculator Input | Expected |
|---|---|---|
| arccos(0.97587) | arccos(0.97587) |
~0.2197 |
| arccos(0.99874) | arccos(0.99874) |
~0.0502 |
| d_F(p,q) | 2*arccos(0.97587) |
~0.4394 |
| d_F(C(p),C(q)) | 2*arccos(0.99874) |
~0.1004 |
VERIFICATION: d_F(C(p), C(q)) ≈ 0.1004 < d_F(p,q) ≈ 0.4394
CONTRACTION CONFIRMED: C shrinks Fisher distance.
Contraction ratio: 0.1004 / 0.4394 ≈ 0.228
Type: 0.1004 / 0.4394 → ~0.23
PART E: Strict Inequality (when p, q differ within a pair)
INPUT: p = (0.3, 0.1, 0.15, 0.05, 0.2, 0.08, 0.07, 0.05) INPUT: r = (0.1, 0.3, 0.15, 0.05, 0.2, 0.08, 0.07, 0.05)
p and r differ only within pair 1: (0.3, 0.1) vs (0.1, 0.3).
C(p) = (0.2, 0.2, 0.1, 0.1, 0.14, 0.14, 0.06, 0.06) C(r) = (0.2, 0.2, 0.1, 0.1, 0.14, 0.14, 0.06, 0.06)
C(p) = C(r) because C averages each pair.
d_F(C(p), C(r)) = 0
d_F(p, r):
√(0.3×0.1) = √0.03 = 0.17321
√(0.1×0.3) = √0.03 = 0.17321
√(0.15×0.15) = 0.15
√(0.05×0.05) = 0.05
√(0.2×0.2) = 0.2
√(0.08×0.08) = 0.08
√(0.07×0.07) = 0.07
√(0.05×0.05) = 0.05
Sum = 0.17321 + 0.17321 + 0.15 + 0.05 + 0.2 + 0.08 + 0.07 + 0.05
= 0.94642
d_F(p,r) = 2·arccos(0.94642)
Type into calculator: 2 * arccos(0.94642)
Expected: ~0.66 (significantly > 0)
VERIFICATION: d_F(C(p), C(r)) = 0 < 0.66 = d_F(p,r)
STRICT INEQUALITY CONFIRMED: When p, r differ within a pair, C collapses them completely.
PART F: Information Loss (computed numerically)
FORMULA:
I_loss(p) = Σₖ₌₁⁴ sₖ · [ (p_{2k-1}/sₖ)·ln((p_{2k-1}/sₖ)/(1/2)) + (p_{2k}/sₖ)·ln((p_{2k}/sₖ)/(1/2)) ]
where sₖ = p_{2k-1} + p_{2k}.
INPUT: p = (0.3, 0.1, 0.15, 0.05, 0.2, 0.08, 0.07, 0.05)
Pair 1: s₁ = 0.3 + 0.1 = 0.4
a = 0.3/0.4 = 0.75, b = 0.1/0.4 = 0.25
KL = 0.75·ln(0.75/0.5) + 0.25·ln(0.25/0.5)
= 0.75·ln(1.5) + 0.25·ln(0.5)
= 0.75·0.40547 + 0.25·(-0.69315)
= 0.30410 - 0.17329
= 0.13081
Term 1: s₁ × KL = 0.4 × 0.13081 = 0.05232
Pair 2: s₂ = 0.15 + 0.05 = 0.2
a = 0.15/0.2 = 0.75, b = 0.05/0.2 = 0.25
KL = 0.75·ln(1.5) + 0.25·ln(0.5)
= 0.13081 (same as above)
Term 2: s₂ × KL = 0.2 × 0.13081 = 0.02616
Pair 3: s₃ = 0.2 + 0.08 = 0.28
a = 0.2/0.28 = 0.71429, b = 0.08/0.28 = 0.28571
KL = 0.71429·ln(0.71429/0.5) + 0.28571·ln(0.28571/0.5)
= 0.71429·ln(1.42858) + 0.28571·ln(0.57142)
= 0.71429·0.35668 + 0.28571·(-0.55962)
= 0.25477 - 0.15989
= 0.09488
Term 3: s₃ × KL = 0.28 × 0.09488 = 0.02657
Pair 4: s₄ = 0.07 + 0.05 = 0.12
a = 0.07/0.12 = 0.58333, b = 0.05/0.12 = 0.41667
KL = 0.58333·ln(0.58333/0.5) + 0.41667·ln(0.41667/0.5)
= 0.58333·ln(1.16667) + 0.41667·ln(0.83333)
= 0.58333·0.15415 + 0.41667·(-0.18232)
= 0.08992 - 0.07597
= 0.01395
Term 4: s₄ × KL = 0.12 × 0.01395 = 0.00167
TOTAL:
I_loss(p) = 0.05232 + 0.02616 + 0.02657 + 0.00167
= 0.10672 nats
In bits: 0.10672 / ln(2) = 0.10672 / 0.69315 = 0.15396 bits
VERIFY on calculator:
0.05232 + 0.02616 + 0.02657 + 0.00167
Result: ~0.1067
SUMMARY (all verified numerically)
| Claim | Verification Method | Result |
|---|---|---|
| C(p) computed | 8 additions, 4 divisions | ✓ sums to 1.0 |
| C∘C = C | Apply C twice, compare | ✓ identical |
| Image M ≅ Δ₃ | Map (0.4,0.2,0.28,0.12) → C(p) | ✓ inverse works |
| Contraction d_F(C(p),C(q)) < d_F(p,q) | Calculator: arccos comparison | ✓ 0.1004 < 0.4394 |
| Strict inequality | p, r differ in pair 1 only | ✓ 0 < 0.66 |
| Information loss | 4 KL divergences, weighted | ✓ 0.1067 nats |