LaTeXing cup product over an indexed set

Question

\[\smile_{i\in I}\alpha_i\]

I write this code and the summation variable i comes as subscript, to the right of the smile (cup product symbol in algebraic topology). I wish to have the index i underneath the cup product symbol, like it does with union, intersection or summation operation in place of the cup product.

Any ideas?

Thanks in advance!

This is very similar to How can I define a math operator behaving like \lim? Use \DeclareMathOperator*. — Werner, Feb 02 '14 at 17:51

Alex R. · Accepted Answer · 2014-02-02T18:05:13.630

3

You can write it as

\[\underset{i\in I}{\smile}\alpha_i\]

The \underset command is provided by the amsmath package.

edited Feb 02 '14 at 18:05

answered Feb 02 '14 at 17:48

Alex R.

178

LaTeXing cup product over an indexed set

1 Answers1