#### product

• General syntax for symbols with a kind of lower and upper limits:

\symbolname_{lowerexpression}^{upperexpression}

• In general, there are two ways how these lower and upper expressions can be placed: centered below and above the symbol or in a subscript / superscript manner. In the first case the symbol name is preceded by the word "big", in the second there is no prefix.
• Syntax for product symbol:

$$\bigprod_{i=k}^{n}gives \bigprod_{i=k}^{n} and \prod_{i=k}^{n}  gives $\prod_{i=k}^{n}$ • Use font size commands for a nicer picture:$$\LARGE\bigprod_{\tiny{i=k}}^{\tiny{n}}gives

\LARGE\bigprod_{\tiny{i=k}}^{\tiny{n}}

and

\large\prod_{\small{i=k}}^{\small{n}}

\$   gives

$\large\prod_{\small{i=k}}^{\small{n}}$