Complexity classes

PPP (complexity)

In computational complexity theory, the complexity class PPP (polynomial pigeonhole principle) is a subclass of TFNP. It is the class of search problems that can be shown to be total by an application of the pigeonhole principle. Christos Papadimitriou introduced it in the same paper that introduced PPAD and PPA. PPP contains both PPAD and PWPP (polynomial weak pigeonhole principle) as subclasses. These complexity classes are of particular interest in cryptography because they are strongly related to cryptographic primitives such as one-way permutations and collision-resistant hash functions. (Wikipedia).

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Related pages

Generalized Riemann hypothesis | Polynomial-time reduction | Integer factorization | One-way function | TFNP | Function problem | FNP (complexity) | Computational complexity theory | Short integer solution problem | Pigeonhole principle | Injective function | Complete (complexity) | Complexity class | Collision resistance