[complexity] ==Definition== PPAD is a subset of the class TFNP, the class of function problems in FNP that are guaranteed to be total. The TFNP formal definition is given as follows: Subclasses of TFNP are defined based on the type of mathematical proof used to prove that a solution always exists. Informally, PPAD is the subclass of TFNP wh...
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http://en.wikipedia.org/wiki/PPAD_(complexity)
Practical Procedures & Aesthetic Dentistry [periodical, périodique]
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http://www.encyclo.co.uk/local/20895
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