NP Problem Solving via Logical Constraint Propagation

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Solution Overview

Problem

Current methods for solving NP problems require hyper-polynomial time, making them inefficient and infeasible for large inputs, especially for NP-complete problems like the Traveling Salesman Problem and Satisfiability Problem.

Innovation Solution

A method that converts NP problems into logical expressions in conjunct-disjunct form, allowing for iterative assumption and implication tracking, resolving contradictions by parameterization, and iteratively setting variable values, enabling polynomial-time solutions using deterministic machines.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If current methods are used to solve NP problems, then the problems can be solved, but the time requirement becomes hyper-polynomial, making them inefficient and infeasible for large inputs

Engineering Contradiction:
Improvetime requirementVSAvoidfeasibility for large inputs
Core Design Contradiction:
Loss of timeVSProductivity

Solution Approach 1:

The patent segments the NP problem into multiple constraints and variables that can be processed iteratively. The problem is divided into conjunct-disjunct form with separate constraints that can be evaluated independently, allowing the system to process complex NP problems through systematic breakdown rather than monolithic hyper-polynomial computation

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary actions by converting the NP problem into conjunct-disjunct form before processing, pre-identifying constraints and variables, and establishing the logical structure in advance. This preliminary transformation enables subsequent polynomial-time processing by deterministic machines rather than requiring hyper-polynomial exhaustive search

Inventive Principle:
Principle #10Preliminary action

2Reliability

If NP problems are solved using traditional algorithms, then correctness is maintained, but the computational complexity becomes infeasible for practical applications

Engineering Contradiction:
ImprovecorrectnessVSAvoidcomputational complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent substitutes the traditional mechanical/computational approach of exhaustive search with a logical inference system based on constraint satisfaction. Instead of mechanically trying all possible solutions (hyper-polynomial), the system uses logical implications and constraint propagation to deduce solutions (polynomial), replacing brute-force computation with structured reasoning

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the parameter representation of the problem by converting NP problems into conjunct-disjunct logical form with explicit constraints and variables. This parameter transformation allows the problem to be solved using polynomial-time constraint satisfaction algorithms rather than hyper-polynomial search, reducing computational complexity while maintaining correctness

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS8577825B2System, method and device for solving problems in NP without hyper-polynomial cost
Publication Date: 2013.11.05 GILLESPIE CLAYTON
  • US8577825B2 patent drawing
  • US8577825B2 patent drawing
  • US8577825B2 patent drawing

AI summary

System, method and device for reducing the time required for solution of problems in the NP complexity class to polynomial time. Within satisfaction problems or problems reducible to a satisfaction problem, the invention tracks the sources of implications and identifies proximal parameterizations of conditional contradictions and subsequently avoids those contradictory conditions. The action is completed in less time than is incurred by existing methods and thus provides a performance improvement to the devices, software, or processes which address such problems.