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The definition of the set of allowable operations used for computation and their respective costs. Some examples of models include Turing machines, recursive functions, lambda calculus, and production systems.
2
votes
PCP is decidable over the unary alphabet
I will use the following formalization: A PCP-instance is a set $X = \{(a_1, b_1), ..., (a_n, b_n)\}$ where $a_i, b_i \in \Sigma^\ast$ where $\Sigma = \{0\}$ is our alphabet (note that thus every $a_i …
2
votes
Accepted
Empirical Risk and True Risk - Generalization Error Proof
This answer (as, I presume, the question) uses the notation of the book Understanding Machine Learning: From Theory to Algorithms by Shai Shalev-Shwartz and Shai Ben-David.
Suppose our domain set is $ …