F is ⊤ or F is ⊥ F is constructed from literals, using only the binary connectives '∧' and '∨' A formula F is in disjunctive normal form(DNF), iff F has the form F = F1 ∨ ... ∨ Fn, n ≥ 1, and each of ...

This simple script can be used to check whether a given propositional formula is a tautology. It uses arithmetic method and works recursively. The formula should be a string or a tuple/list of strings ...

The propositional satisfiability problem (SAT) was the first to be shown NP-complete by Cook and Levin. SAT remained the embodiment of theoretical worst-case hardness. However, in stark contrast to ...

Abstract: Satisfiability degree measures the extent of a propositional formula to be true. Existing propositional matrix search algorithm computes the satisfiability degree of a propositional formula ...

Abstract: Deciding whether a propositional formula in conjunctive normal form is satisfiable (SAT) is an NP-complete problem. The problem becomes linear when the formula contains binary clauses only.

Briefly, an AHEAD or GenVoca model of a domain is a grammar. Tokens represent individual features and sentences represent particular compositions of tokens. Not all sentences are legal. Arbitrary ...