Symbols:Brackets/Square Brackets

Symbol
Square brackets are symbols used in a number of specific contexts.

They comprise the left (square) bracket $[$ and the right (square) bracket $]$.

Usage
Square brackets are used in the following contexts:


 * Expressing a number to a specific base, for example: $\sqbrk {r_m r_{m - 1} \ldots r_2 r_1 r_0}_b$


 * To contain the argument for the image of a subset under a mapping: $f \sqbrk T := \set {\map f x: x \in T}$