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15.5 kB
| """Resource-accounted recursive verifier purification; no hardware claims. | |
| The exact signal verifier is a q-ary symmetric channel. Two independent child | |
| outputs are accepted when they agree; otherwise the pair is retried. The code | |
| compares closed recursion against an independent absorbing Markov chain over | |
| the recursive program's pending-symbol stack. A gate's saved acquisition cost | |
| can fund stronger exported E_q(t,u) experiments at fixed expected cost. | |
| The binary hierarchy is a classical SPRT realization. These calculations do | |
| not establish a new sequential-testing principle or general intelligence RSI. | |
| """ | |
| from __future__ import annotations | |
| import argparse | |
| import itertools | |
| import json | |
| import math | |
| from pathlib import Path | |
| import numpy as np | |
| from scipy.optimize import linprog | |
| def _validate(q: int, u: float, level: int = 0, m: int = 2) -> None: | |
| if int(q) != q or q < 2: | |
| raise ValueError("q must be an integer >= 2") | |
| if not math.isfinite(u) or not 0 <= u <= 1: | |
| raise ValueError("u must be in [0,1]") | |
| if int(level) != level or level < 0: | |
| raise ValueError("level must be a nonnegative integer") | |
| if int(m) != m or m < 2: | |
| raise ValueError("m must be an integer >= 2") | |
| def pure_level(q: int, u: float, level: int, m: int = 2) -> dict: | |
| """Closed distribution and expected raw SIGNAL calls for one level. | |
| Calls at each recursion node are independent conditional on the same | |
| hidden target. The recursion's depth is not its computational cost. | |
| """ | |
| _validate(q, u, level, m) | |
| d = q - 1 | |
| initial = u | |
| raw_calls = 1.0 | |
| acceptance = [] | |
| for _ in range(level): | |
| p = (1 + d * u) / q | |
| r = (1 - u) / q | |
| s = p ** m + d * r ** m | |
| acceptance.append(s) | |
| raw_calls *= m / s | |
| u = (p ** m - r ** m) / s | |
| # Use odds independently of the preceding contrast recursion to retain | |
| # very small errors and identify floating-point saturation explicitly. | |
| if initial == 1: | |
| log_error = None | |
| error = 0.0 | |
| else: | |
| log_x = math.log((1 - initial) / (1 + d * initial)) | |
| log_y = m ** level * log_x | |
| y = math.exp(log_y) | |
| log_error = math.log(d) + log_y - math.log1p(d * y) | |
| error = math.exp(log_error) | |
| contrast_from_odds = 1 - q * error / d | |
| return { | |
| "level": level, | |
| "m": m, | |
| "q": q, | |
| "initial_contrast": initial, | |
| "contrast": contrast_from_odds, | |
| "contrast_recursion": u, | |
| "accepted_signal_correct_probability": 1 - error, | |
| "accepted_signal_error_probability": error, | |
| "log_accepted_signal_error_probability": log_error, | |
| "contrast_rounded_to_one": contrast_from_odds == 1 and initial < 1, | |
| "expected_raw_signal_calls": raw_calls, | |
| "node_acceptance_probabilities": acceptance, | |
| "scope": "independent repeated signals of ONE fixed target", | |
| } | |
| def stack_chain(q: int, u: float, level: int) -> dict: | |
| """Independent absorbing-chain computation for the actual binary tree. | |
| Each stack slot is empty (-1) or holds one pending child symbol. One raw | |
| signal is fed at the bottom. Agreeing pairs ripple upward; mismatches | |
| clear their slot and restart there. The transition matrix is constructed | |
| from raw symbols without using the closed purification or cost formula. | |
| """ | |
| _validate(q, u, level) | |
| if level == 0: | |
| probs = np.full(q, (1 - u) / q) | |
| probs[0] += u | |
| return {"expected_raw_signal_calls": 1.0, | |
| "output_probabilities_given_target_zero": probs.tolist(), | |
| "transient_states": 0, "linear_residual": 0.0} | |
| states = list(itertools.product(range(-1, q), repeat=level)) | |
| lookup = {state: index for index, state in enumerate(states)} | |
| nstates = len(states) | |
| transition = np.zeros((nstates, nstates)) | |
| absorb = np.zeros((nstates, q)) | |
| raw = np.full(q, (1 - u) / q) | |
| raw[0] += u | |
| for row, state in enumerate(states): | |
| for symbol, probability in enumerate(raw): | |
| if probability == 0: | |
| continue | |
| next_state = list(state) | |
| absorbed = True | |
| for slot in range(level): | |
| if next_state[slot] == -1: | |
| next_state[slot] = symbol | |
| absorbed = False | |
| break | |
| if next_state[slot] == symbol: | |
| next_state[slot] = -1 | |
| continue | |
| next_state[slot] = -1 | |
| absorbed = False | |
| break | |
| if absorbed: | |
| absorb[row, symbol] += probability | |
| else: | |
| transition[row, lookup[tuple(next_state)]] += probability | |
| matrix = np.eye(nstates) - transition | |
| rhs = np.column_stack((np.ones(nstates), absorb)) | |
| solution = np.linalg.solve(matrix, rhs) | |
| origin = lookup[(-1,) * level] | |
| return { | |
| "expected_raw_signal_calls": float(solution[origin, 0]), | |
| "output_probabilities_given_target_zero": solution[origin, 1:].tolist(), | |
| "transient_states": nstates, | |
| "linear_residual": float(np.max(np.abs(matrix @ solution - rhs))), | |
| "transition_row_sum_error": float(np.max(np.abs( | |
| transition.sum(axis=1) + absorb.sum(axis=1) - 1))), | |
| } | |
| def exported_levels(q: int, u: float, t: float, overhead: float, | |
| readout_cost: float = 1.0, max_level: int = 3) -> list[dict]: | |
| """Same outer retention t at every level; costs include all retries. | |
| overhead h must cover ALL nonreadout per-primitive-trial costs. An outer | |
| target-independent Bernoulli(t) requests a signal only on nonerasure. | |
| A raw accepted signal costs (h+tE)/t in expectation. Hence unconditional | |
| exported cost equals (h+tE)*expected_raw_signal_calls; t cancels. | |
| """ | |
| if not 0 < t <= 1 or overhead < 0 or readout_cost <= 0: | |
| raise ValueError("Require 0<t<=1, h>=0, E>0") | |
| cg = overhead + t * readout_cost | |
| rows = [] | |
| for k in range(max_level + 1): | |
| row = pure_level(q, u, k) | |
| row["outer_retention"] = t | |
| row["expected_logical_cost"] = cg * row["expected_raw_signal_calls"] | |
| row["uniform_prior_full_call_MAP_error"] = ( | |
| (q - 1) / q * (1 - t * row["contrast"])) | |
| rows.append(row) | |
| return rows | |
| def upper_concave_hull(levels: list[dict]) -> list[dict]: | |
| """Upper hull of (expected_cost,contrast), restricted to supplied levels.""" | |
| points = sorted(levels, key=lambda row: row["expected_logical_cost"]) | |
| hull = [] | |
| for row in points: | |
| x, y = row["expected_logical_cost"], row["contrast"] | |
| if hull and x == hull[-1]["expected_logical_cost"]: | |
| if y <= hull[-1]["contrast"]: | |
| continue | |
| hull.pop() | |
| while len(hull) >= 2: | |
| a, b = hull[-2:] | |
| # Upper concavity requires nonincreasing consecutive slopes. | |
| cross = ((b["expected_logical_cost"] - a["expected_logical_cost"]) | |
| * (y - b["contrast"]) | |
| - (b["contrast"] - a["contrast"]) | |
| * (x - b["expected_logical_cost"])) | |
| if cross < 0: | |
| break | |
| hull.pop() | |
| hull.append(row) | |
| return hull | |
| def budget_mixture(levels: list[dict], budget: float) -> dict: | |
| """Optimal contrast at budget among mixtures of the supplied levels. | |
| This is a finite-family optimum. It is not optimal over all possible | |
| sequential/posterior confidence acquisition programs. | |
| """ | |
| hull = upper_concave_hull(levels) | |
| if not hull or budget < hull[0]["expected_logical_cost"]: | |
| raise ValueError("Budget cannot fund even the least costly supplied level") | |
| left = right = hull[-1] | |
| weight_right = 0.0 | |
| for a, b in zip(hull, hull[1:]): | |
| if budget <= b["expected_logical_cost"]: | |
| left, right = a, b | |
| weight_right = ((budget - a["expected_logical_cost"]) | |
| / (b["expected_logical_cost"] | |
| - a["expected_logical_cost"])) | |
| break | |
| contrast = (1 - weight_right) * left["contrast"] + weight_right * right["contrast"] | |
| cost = ((1 - weight_right) * left["expected_logical_cost"] | |
| + weight_right * right["expected_logical_cost"]) | |
| q, t = left["q"], left["outer_retention"] | |
| error = (q - 1) / q * (1 - contrast) | |
| initial = left["initial_contrast"] | |
| original_error = (q - 1) / q * (1 - initial) | |
| return { | |
| "family": "finite-level recursive unanimous signal verifiers", | |
| "hull_levels": [row["level"] for row in hull], | |
| "left_level": left["level"], | |
| "right_level": right["level"], | |
| "right_probability": weight_right, | |
| "budget": budget, | |
| "expected_logical_cost": cost, | |
| "unused_budget": max(0.0, budget - cost), | |
| "contrast": contrast, | |
| "outer_retention": t, | |
| "accepted_signal_error_probability": error, | |
| "accepted_error_relative_reduction": (original_error - error) / original_error | |
| if original_error > 0 else 0.0, | |
| "original_uniform_prior_full_call_MAP_error": (q - 1) / q * (1 - t * initial), | |
| "uniform_prior_full_call_MAP_error": (q - 1) / q * (1 - t * contrast), | |
| "old_to_new_deficiency": (q - 1) / q * t * (contrast - initial), | |
| "new_to_old_deficiency": 0.0, | |
| "claims": "same outer retention and expected cost; not constant latency; not hardware evidence", | |
| } | |
| def _independent_checks() -> dict: | |
| records = [] | |
| max_cost_relative_error = max_prob_error = max_linear_residual = 0.0 | |
| cases = [(q, u, k) for q in (2, 3, 5) for u in (0.2, 0.6, 0.9) for k in (1, 2)] | |
| cases += [(q, 0.6, 3) for q in (2, 3, 5)] | |
| for q, u, k in cases: | |
| closed = pure_level(q, u, k) | |
| chain = stack_chain(q, u, k) | |
| expected = np.full(q, closed["accepted_signal_error_probability"] / (q - 1)) | |
| expected[0] = closed["accepted_signal_correct_probability"] | |
| cost_error = abs(chain["expected_raw_signal_calls"] | |
| - closed["expected_raw_signal_calls"]) / closed["expected_raw_signal_calls"] | |
| probability_error = float(np.max(np.abs(np.asarray( | |
| chain["output_probabilities_given_target_zero"]) - expected))) | |
| max_cost_relative_error = max(max_cost_relative_error, cost_error) | |
| max_prob_error = max(max_prob_error, probability_error) | |
| max_linear_residual = max(max_linear_residual, chain["linear_residual"]) | |
| records.append({"q": q, "u": u, "level": k, | |
| "relative_expected_cost_error": cost_error, | |
| "max_output_probability_error": probability_error, | |
| "independent_absorbing_chain": chain}) | |
| binary_error = 0.0 | |
| for u, k in itertools.product((.1, .2, .6, .9), range(5)): | |
| row = pure_level(2, u, k) | |
| n = 2 ** k | |
| v = math.tanh(n * math.atanh(u)) | |
| expected_cost = n * v / u | |
| binary_error = max(binary_error, abs(row["contrast"] - v), | |
| abs(row["expected_raw_signal_calls"] - expected_cost) / expected_cost) | |
| passed = max(max_cost_relative_error, max_prob_error, max_linear_residual, | |
| binary_error) < 1e-9 | |
| return {"status": "PASS" if passed else "FAIL", "cases": len(cases), | |
| "method": "full raw-symbol absorbing Markov chain on recursive pending stack", | |
| "max_relative_cost_error": max_cost_relative_error, | |
| "max_output_probability_error": max_prob_error, | |
| "max_linear_system_residual": max_linear_residual, | |
| "binary_SPRT_identity_checks": 20, | |
| "max_binary_identity_error": binary_error, "records": records} | |
| def _hull_lp_checks() -> dict: | |
| """Independent unrestricted mixture LP, with no hull assumptions.""" | |
| records = [] | |
| max_error = 0.0 | |
| for q, u, t, h in ((2, .55, .25, .1), (3, .4, 1 / 9, .1), | |
| (5, .6, .04, .1)): | |
| levels = exported_levels(q, u, t, h, max_level=3) | |
| costs = np.asarray([row["expected_logical_cost"] for row in levels]) | |
| contrasts = np.asarray([row["contrast"] for row in levels]) | |
| for budget in np.linspace(costs[0], costs[-1], 9): | |
| answer = budget_mixture(levels, float(budget)) | |
| lp = linprog(-contrasts, A_ub=costs[None, :], | |
| b_ub=[budget], A_eq=np.ones((1, len(levels))), | |
| b_eq=[1.0], bounds=[(0, None)] * len(levels), | |
| method="highs") | |
| if not lp.success: | |
| raise RuntimeError(lp.message) | |
| error = abs(answer["contrast"] + lp.fun) | |
| max_error = max(max_error, error) | |
| records.append({"q": q, "u": u, "budget": float(budget), | |
| "hull_contrast": answer["contrast"], | |
| "unrestricted_mixture_LP_contrast": float(-lp.fun), | |
| "absolute_error": error}) | |
| return {"status": "PASS" if max_error < 1e-9 else "FAIL", | |
| "cases": len(records), "max_contrast_error": max_error, | |
| "scope": "all mixtures of supplied finite levels, not all sequential programs", | |
| "records": records} | |
| def run() -> dict: | |
| checks = _independent_checks() | |
| hull_checks = _hull_lp_checks() | |
| levels = exported_levels(5, .6, .04, .1, max_level=3) | |
| mixture = budget_mixture(levels, 1.1) | |
| old_map = mixture["original_uniform_prior_full_call_MAP_error"] | |
| new_map = mixture["uniform_prior_full_call_MAP_error"] | |
| mixture["full_call_MAP_error_absolute_reduction"] = old_map - new_map | |
| mixture["full_call_MAP_error_relative_reduction"] = (old_map - new_map) / old_map | |
| return { | |
| "status": "PASS" if checks["status"] == hull_checks["status"] == "PASS" else "FAIL", | |
| "research": "Evie's Pure Form RSI", | |
| "scope": "mathematical verifier-strengthening component under explicit conditional-independent channels", | |
| "physical_measurements": False, | |
| "general_intelligence_gain_established": False, | |
| "prior_art_boundary": "binary hierarchy equals classical SPRT; neither consensus nor sequential testing is claimed as invention", | |
| "cost_contract": "h includes every nonreadout cost per primitive trial; E is acquisition cost; expected cost, unbounded retry tails", | |
| "independent_checks": checks, | |
| "finite_mixture_LP_checks": hull_checks, | |
| "q5_example": { | |
| "q": 5, "base_retention": .04, "base_contrast": .6, | |
| "overhead_h_over_E": .1, "readout_E": 1.0, | |
| "ungated_expected_cost": 1.1, | |
| "gated_primitive_expected_cost": .14, | |
| "gate_saving_ratio": 1.1 / .14, | |
| "levels": levels, "fixed_budget_mixture": mixture, | |
| }, | |
| } | |
| if __name__ == "__main__": | |
| parser = argparse.ArgumentParser(description=__doc__) | |
| parser.add_argument("--output", default=str(Path(__file__).resolve().parent / "data" / "bootstrap.json")) | |
| args = parser.parse_args() | |
| report = run() | |
| path = Path(args.output) | |
| path.parent.mkdir(parents=True, exist_ok=True) | |
| path.write_text(json.dumps(report, indent=2) + "\n", encoding="utf-8") | |
| print(json.dumps({"status": report["status"], | |
| "independent_checks": {k: v for k, v in report["independent_checks"].items() if k != "records"}, | |
| "fixed_budget_mixture": report["q5_example"]["fixed_budget_mixture"]}, indent=2)) | |
| raise SystemExit(0 if report["status"] == "PASS" else 1) | |