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Very simple question.

For a subring, submodule, subgroup, subspace of an appropriate object we often define them by the generators.

In this case we say subgroup generated by $x_1,\cdots x_n$ or $<x_1,\cdots x_n>$ except we don't quite use the inequality signs.

Could someone tell me how to type the notation for 'spanning'?

Jack Yoon
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1 Answers1

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$\langle x_1,\ldots,x_n \rangle$ for $\langle x_1,\ldots,x_n \rangle$.

$\left< x_1,\ldots,x_n \right>$ gives $\left< x_1,\ldots,x_n \right>$ and is marginally shorter to type -- but then the brackets will grow vertically if there are tall formulas between them, which may not always be what you desire.

  • exactly what I wanted. Now I think of it I used to know this notation but really couldn't find it. I will accept it when I can (apparently I need to wait) – Jack Yoon Jun 30 '17 at 17:45