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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.

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By your definition, all problems with defined finite solutions are effectively solvable. Just set the algorithm $A(P_i)$ to be "output $x$", where $x$ is the solution to $P_i$. For example, the algori …
answered Sep 26 '17 by Xerxes