A statement letter or a negation of a statement letter (Mendelson 1997, p. 30).
Literal
See also
Conjunctive Normal Form, Disjunctive Normal Form, Negation, Statement LetterExplore with Wolfram|Alpha
References
Mendelson, E. Introduction to Mathematical Logic, 4th ed. London: Chapman & Hall, 1997.Referenced on Wolfram|Alpha
LiteralCite this as:
Weisstein, Eric W. "Literal." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Literal.html