# Definition:Stirling Numbers of the Second Kind/Notation

## Definition

The notation $\ds {n \brace k}$ for Stirling numbers of the second kind is that proposed by Jovan Karamata and publicised by Donald E. Knuth.

Other notations exist.

Usage is inconsistent in the literature.

## Technical Note

The $\LaTeX$ code for $\ds {n \brace k}$ is \ds {n \brace k} .

The braces around the n \brace k are important.

The \ds is needed to create the symbol in its proper house display style.