Symbols:Symbolic Logic/Deprecated Symbols/Biconditional
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Biconditional
- $\leftrightarrow$
A binary operation on two propositions.
$P \leftrightarrow Q$ means $P$ is true if and only if $Q$ is true.
An alternative to $P \iff Q$, which is what is generally used nowadays by logicians.
The $\LaTeX$ code for \(P \leftrightarrow Q\) is P \leftrightarrow Q .