related words 
approach 
condition 
prove 
difficult 
lack 
true 
reason 
complex 
avoid 
achieve 
instance 
simply 
fact 
combination 
simple 
key 
completely 
affect 
situation 
improve 

related documents 
Computational complexity theory 
Word problem for groups 
Boolean satisfiability problem 
NPcomplete 
Linear programming 
Travelling salesman problem 
Knapsack problem 
Subset sum problem 
Artificial intelligence 
Pcomplete 
Chess problem 
Quantum computer 
P = NP problem 
Problem of evil 
NP (complexity) 
Decision problem 
PSPACEcomplete 
NPhard 
Numerical analysis 
Optimization (mathematics) 

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