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How can I get a left bracket without a right bracket?

Since brackets have a grouping function, they must always match and nest correctly. Use a left bracket and omit the right bracket as shown in the following examples.

Escape the bracket with a back slash for a single bracket without a matching bracket partner. For example, enter \[ to get a "[" without a corresponding "]"

Enter \[3 ";" 8\) to typeset the interval [3;8). The quotation marks around the semicolon ensure that it is not typeset in italic. (You're right, this has nothing to do with brackets!)

For scalable brackets it is essential that the left and right match, since the content enclosed by the brackets must be well defined. In this case use the invisible bracket, none, to get a single bracket. For example, enter left [ ... right none to get a scalable "[" without a corresponding "]".

Enter x=left lbrace binom -5 3 right none to typeset the follwing formula:

image of formula to typeset

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