\xrightarrow[under]{over}

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\xrightarrow[under]{over}

Extensible arrows are used in mathematical notation to represent mappings, transformations, or transitions from one state or element to another. The command \xrightarrow[under]{over} creates a right-pointing arrow with optional text above and below it, allowing for more descriptive annotations in mathematical expressions.

Examples

A f B

A function f mapping set A to set B.

A \xrightarrow{f} B

x n \to \infty y

x approaches y as n tends to infinity.

x \xrightarrow{n \to \infty} y

H_{2} O h e a t Δ H_{2} + O_{2}

Chemical reaction indicating water decomposing into hydrogen and oxygen with heat.

H_2O \xrightarrow[\Delta]{heat} H_2 + O_2