"Implies" is the connective in propositional calculus which has the meaning "if is true, then is also true." In formal terminology, the term conditional
is often used to refer to this connective (Mendelson 1997, p. 13). The symbol
used to denote "implies" is ,
(Carnap 1958, p. 8; Mendelson 1997, p. 13), or .

The Wolfram Language command Implies[p,
q] can be used to represent the logical implication .

In classical logic,
is an abbreviation for ,
where denotes NOT
and denotes OR
(though this is not the case, for example, in intuitionistic
logic).
is a binary operator that is implemented in the Wolfram
Language as Implies[A,
B], and can not be extended to more than two arguments.

has the following truth
table (Carnap 1958, p. 10; Mendelson 1997, p. 13).

T

T

T

T

F

F

F

T

T

F

F

T

If and (i.e., ), then and
are said to be equivalent, a relationship which is
written symbolically as ,
, or (Carnap 1958, p. 8).