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A computation model in which the computation is described via circuits of various logic gates.

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Why do all recent SAT solvers work on CNF instead of circuit SAT?

Intuitively to me concentrating on circuit SAT seems to make a lot of sense: Many if not most problems are more naturally expressed as circuit SAT than CNF; circuits provide structural information that … cannot be reverse engineered from CNF, but circuits can always be transformed into CNF; and at least the industrially significant field of logic synthesis seems to be a particularly good fit for AIGs. …
Sami Liedes's user avatar