Product symbol c on the lower suffix

Sorry, this may be very easy question but I didn't get. When I use product symbol, I want to write c(as a cardinal product) in the lower suffix. I am using following command.

\documentclass{12 pt}{article}

\begin{document}

$\prod_{i = 1}^{n}_{c} A_{i}$

\end{document}


I’m not sure want exactkly you like to get but you can inlcude the _c part inside the braces of n:

\prod_{i = 1}^{n_c} A_{i}


which will give

Pleas note that the first argument of \documentclass is optional and for that needy square brackets, and the font size option is without a space, i.e. 12pt instead of 12 pt

• Thank you very much Tobi. Actually, I need c in the lower suffix of product. Like \prod_{c}, where c represent the symbol of cardinal product. – Rajesh Aug 12 '13 at 22:31
• Then it's \mathop{\prod_c}\limits_{i=1}^n – kahen Aug 12 '13 at 22:33
• @kahen: Why don’t you extend your comment and write an answer (e.g. explaining why the \mathop is necessary …) – Tobi Aug 12 '13 at 23:37

Can you be more specific about what you want the "c" to be a suffix of? Would either

${\prod_{i = 1}^{n}}_{c} A_{i}$


or

${\prod_c}^n_{i = 1} A_{i}$


suffice?

Also, your first line of code should be: \documentclass[12 pt]{article}.