time-constructible function

English

Noun

time-constructible function (countable and uncountable, plural time-constructible functions)

1. (computational complexity theory) A function f from natural numbers to natural numbers with the property that f(n) can be constructed from n by a Turing machine in the time of order f(n), whose purpose of such a definition is to exclude functions that do not provide an upper bound on the runtime of some Turing machine.