I know how to have inline math typeset as in display mode in LaTeX, i.e summations with the index below the sigma, but I'm trying to learn ConTeXt and cannot figure out how to do it.
Any thoughts? Is there a way to do it in ConTeXt?
[Tex/LaTex] Inline Math in Display Mode
contextmath-mode
Related Solutions
From the Blackboard bold page in contextgarden:
Blackboard bold is probably the most common way of denoting the "standard" number sets: the natural numbers, the integers and so on. In AMS-LaTeX, you use the
\mathbb{...}command to obtain them; the ConTeXt way is the\blackboard{...}command. Also, the following commands are defined:
\naturalnumbers
\integers
\rationals
\reals
\complexes
\primes
\blackboard{F}
\blackboard{O}
There are two separate aspects to your question, which can be addressed separately:
How to control the size of the integral, sum and product symbols
How to control the placement of the limits of integration, summation, and multiplication, namely side-set or above/below.
Default settings
The default settings, with the amsmath package loaded, are
Inline math
- Small symbol size;
- Limits are side-set for all operators;
- The
sumlimitsandintlimitsoptions ofamsmathdo not affect the placement of limits in inline math.
Display math
Large symbol size. See Tables 72 through 83 in the Comprehensive LaTeX Symbol List for the names of these 'large' or, more precisely, Variable-sized Math Operators;
For
\int-type symbols, the limits are side-set unlessamsmathwas loaded with the optionintlimits.The integral symbols are treated separately presumably because they are generally taller than the other variable-sized symbols.
For
\sum,\prod,\coprod, etc the limits are set above and below the operator, except when theamsmathwas loaded with the optionnosumlimits.The
sumlimitsandnosumlimitsoptions and the\limitsand\nolimitscommands affect the appearance not only of sum-type symbols but of\prod,\coprod,\bigcupand\bigcap, etc. as well.
Custom settings
To control the size of the symbol, one writes before the command generating the symbol
\textstylefor small symbols;\displaystylefor large symbols; .- the declarations
\textstyleand\displaystylemay also affect the behavior of subsequent commands in the current math-mode environment, as observed by @HaraldHancheOlsen.
To control the placement of the limits, one writes after the command generating the symbol
\nolimitsfor side-set limits;\limitsfor limits set above and below.
These possibilities are illustrated in the table below:
The table was produced by the following code:
\documentclass[letterpaper]{standalone}
\usepackage{array,amsmath,booktabs}
\begin{document}
\Huge
\begin{tabular}{l
>{$\textstyle}l<{$} % first math column: text style
>{$\displaystyle}l<{$}} % second math column: display style
\toprule
Placement of limits & \multicolumn{2}{c}{Size of operators} \\
\cmidrule{2-3}
& \multicolumn{1}{l}{small:}
& \multicolumn{1}{l}{large:}\\
& \multicolumn{1}{l}{\texttt{\textbackslash textstyle}}
& \multicolumn{1}{l}{\texttt{\textbackslash displaystyle}}\\
\cmidrule[\lightrulewidth]{2-3}
Next to symbol: & \multicolumn{1}{l}{\phantom{\texttt{\textbackslash displaystyle }}}\\
\texttt{\textbackslash nolimits}
& \sum\nolimits_{i=1}^N a_i
& \sum\nolimits_{i=1}^N a_i \\[2ex]
& \prod\nolimits_{j=0}^J k_j
& \prod\nolimits_{j=0}^J k_j \\[2.5ex]
& \int\nolimits_{-\infty}^\infty f(x)\,\mathrm{d}x
& \int\nolimits_{-\infty}^\infty f(x)\,\mathrm{d}x \\[5ex]
Below \& above symbol:\\[-1ex]
\texttt{\textbackslash limits}
& \sum\limits_{i=1}^N a_i
& \sum\limits_{i=1}^N a_i \\[3.5ex]
& \prod\limits_{j=0}^J k_j
& \prod\limits_{j=0}^J k_j \\[4ex]
& \int\limits_{-\infty}^\infty f(x)\,\mathrm{d}x
& \int\limits_{-\infty}^\infty f(x)\,\mathrm{d}x \\
\bottomrule
\end{tabular}
\end{document}
Personal comments
Finally, some personal views on the (ab)uses of the \limits and \displaystyle commands when in inline math mode:
- It's generally not a good idea to use the
\limitscommand when in inline math mode. Otherwise, one is virtually assured of wrecking the appearance of the paragraph where the formula appears. - When in inline math mode, it's frequently not even necessary to indicate the full set of limits of a summation or multiplication. Expressions such as
\sum_ior\prod_jare usually just fine. You may even be able to get away with omitting theiandjindices of summation/multiplication. - Using the
\displaystylecommand (to force the creation of large symbols) while in inline math mode is an even worse idea than using\limits.
Best Answer
These two ways should work also in ConTeXt:
Probably the second form is preferable, although I usually advise not to put limits above and below in in-line math formulas.