In logic and related fields such as mathematics and philosophy, "if and only if" (often shortened as "iff") is paraphrased by the biconditional, a logical connective [1] between statements. The …

若且唯若（英語： if and only if ， iff ），在數位邏輯中，邏輯算符 反互斥或閘（英語： Exclusive NOR ）是對兩個運算元的一種邏輯分析類型，符號為XNOR或ENOR或 。與一般的邏輯或 …

A iff B, also written A if and only if B, is true if A and B have the same truth value. It represents (A if B) and (A only if B) and is written $A \iff B$

The symbol $\iff$ means "if and only if (iff)" or "implies and is implied by" or "is equivalent to". It is \iff. For example, $$x=1 \implies x^2=1$$ is a correct use but $$x=1\iff x^2=1$$ is incorrect …

2015年11月12日 · "iff" is shorthand for "if and only if", so let's deal with "only if" first. Though it's less common in English than "if", "A only if B" means: A is true only when B is true — that is, …

2024年12月13日 · The logical connective iff is a convenient shorthand for if and only if. A A iff B B is generally symbolized by means of a two-headed arrow, for example: The notation used on …

A iff B is written symbolically as A<->B, A<=>B, A<->B, or A <==> B. A iff B is also equivalent to A=>B together with B=>A, where the symbol => denotes "implies." Other equivalent terms are …

Iff: Notation $A$ iff $B$ is generally symbolized by means of a two-headed arrow, for example: $A \ \leftrightarrow \ B$ $A \ \Leftrightarrow \ B $ $A \ \longleftrightarrow \ B$ $A \iff B$ The …

\iff (= \Leftrightarrow) or \longLeftrightarrow or \xLeftrightarrow (extensible, load the mathtools package) Single line: \leftrightarrow or \longleftrightarrow or \xleftrightarrow (extensible, load …

Iff is an abbreviation for the phrase "if and only if." In mathematical notation, "iff" is expressed as . It is also known as a biconditional statement. An iff statement means and at the same time. In …