AC0 - Wikipedia AC0 (alternating circuit) is a complexity class used in circuit complexity It is the smallest class in the AC hierarchy, and consists of all families of circuits of depth O (1) and polynomial size, with unlimited- fanin AND gates and OR gates (we allow NOT gates only at the inputs) [1]
AC0 - HandWiki AC0 is a complexity class used in circuit complexity It is the smallest class in the AC hierarchy, and consists of all families of circuits of depth O (1) and polynomial size, with unlimited-fanin AND gates and OR gates (we allow NOT gates only at the inputs) [1] It thus contains NC0, which has only bounded-fanin AND and OR gates [1]
cc. complexity theory - Why is the circuit class AC0 . . . The class AC0 A C 0 arises very naturally as the circuit characterization of problems definable by formulas of first-order logic A language over the alphabet {0, 1} {0, 1} is in AC0 A C 0 if and only if it is definable in first-order logic in the language of word structures See e g Immerman's book for more details
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