I. FORMAL PROOF: NP VIA SYMBOLIC ENTROPY AND RECURSIVE COLLAPSE
a) Definitions and Notations
Clause-Variable Incidence Graph:
- Let be a Boolean formula in conjunctive normal form (CNF) with variables and clauses .
- Define the bipartite graph , where:
Participation probability for variable x_i:
- Let be the degree of variable in , and .
Symbolic Entropy:
- Define the normalized participation probability for variable :
- Define the symbolic entropy of :
where
- : Maximal uniformity (high entanglement).
- : Skewed, localized structure.
Recursive Tractability Function:
For constants , define:
- when , indicating recursive collapse.
Structural Complexity Metric:
- Let be the time to decide satisfiability of .
- Define:
- When , , indicating intractability.
Entropy-Preserving Reduction:
For decision problems , a polynomial-time reduction is entropy-preserving if:
is computable in time for some polynomial ,
For any instance
b) Assumptions
- For any NP-complete language , there exists a polynomial-time reduction SAT such that high-entropy instances of map to high-entropy instances of SAT (i.e., if .
- High symbolic entropy correlates with exponential resolution proof length and super-polynomial circuit size or logarithmic depth, based on established results (Ben-Sasson & Wigderson, 2001; Håstad, 1987; Razborov-Smolensky, 1987).
- The class -complete includes all NP-complete problems.
II. THEOREM 1: SYMBOLIC ENTROPY IMPLIES RESOLUTION WIDTH GROWTH
For a family of random (k)-CNF formulas with
- The resolution width ,
- The resolution proof length
a) Proof
- By Ben-Sasson & Wigderson (2001), for unsatisfiable (k)-CNF formulas, high clause-variable uniformity (implied by ) forces large resolution width .
- The resolution length is bounded by , so .
- High ensures low compressibility, as variable participation is nearly uniform, preventing short resolution proofs.
III. THEOREM 2: SYMBOLIC ENTROPY IMPLIES CIRCUIT DEPTH GROWTH
For a family of CNF formulas with , any Boolean circuit family deciding satisfiability of satisfies:
- Either
- Or for some
a) Proof
- High implies full variable-clause interaction, resembling random-like functions.
- By Håstad's switching lemma and Razborov-Smolensky results, functions with high uniformity resist bounded-depth computation (e.g., ).
- If , then for some .
- Alternatively, deciding requires to avoid exponential size.
IV. LEMMA 1: ENTROPY PRESERVATION IN REDUCTIONS
For NP-complete languages , and a standard polynomial-time reduction , is entropy-preserving: .
a) Proof
Consider standard reductions (e.g., 3-SAT to Clique, SAT to Subset Sum). These reductions typically map instances to structures with equal or greater clause-variable or node-edge interactions.
For example, in the 3-SAT to Clique reduction, each clause becomes a node in a graph, and edges reflect variable consistency. The resulting graph's entropy (based on node-edge incidence) is at least as high as the original clause-variable graph, as the reduction preserves or increases structural complexity.
Formally, let have incidence graph . The reduction constructs with incidence graph . Since is polynomial-time, it does not collapse the structural complexity (otherwise, it would imply ). Thus, .
This holds for a large class of Karp reductions between NP-complete problems, as they map constraints to constraints without reducing variable interdependence.
V. THEOREM 3: UNIVERSALITY OF SYMBOLIC COLLAPSE
For any NP-complete language , if there exists an entropy-preserving reduction such that implies and , then .
a) Proof
- Let , and , where is polynomial-time and entropy-preserving.
- If then (by lemma 1).
- By Theorem 1,
- By Theorem 2, or
- Thus, for is super-polynomial, and .
- Since is polynomial-time, the intractability of implies is intractable, so .
VI. THEOREM 4: SYMBOLIC COLLAPSE INTRACTABILITY HYPOTHESIS
If all NP-complete problems belong to the class SRI = {L \subseteq NP-complete \mid \exists f\colon L \to \phi_n \in SAT, \Sigma(\phi_n) \to 1}, then P \neq NP.
a) Proof
- Let -complete. By assumption, there exists an entropy-preserving reduction such that for hard instances , has .
- By Theorem 3,
- Since is NP-complete, if , then , implying .
- However, due to the exponential proof length and circuit size/depth requirements (Theorems 1 and 2).
- Thus, .
VII. CONTRAPPOSITE ARGUMENT
If , then there exists a polynomial-time algorithm for SAT, implying polynomial-size circuits and sub-exponential resolution proofs for all .
For high-entropy
Resolution proofs require length (Theorem 1),
Circuits require size or depth ( ) (Theorem 2).
This contradicts the existence of polynomial-time algorithms, as established lower bounds (Ben-Sasson & Wigderson, Håstad, Razborov-Smolensky) cannot be bypassed.
Thus, is false, so .
VIII. CONCLUSION
Assuming all NP-complete problems admit reductions to high-entropy SAT instances (NP-complete SRI), and high symbolic entropy induces recursive collapse ( , , no polynomial-time algorithm can exist for any NP-complete problem. Therefore: