Hypertext Help with LaTeX
Math fonts and styles
The following applies to both LaTeX 2.09 and LaTeX2e.
- \textstyle - default in the running text and in array environment
- \displaystyle - default for displayed equations
- \scriptstyle - default for first-level sub and superscripts
- \scriptscriptstyle - default for higher-level sub and superscripts
All four of these may be used in math mode as declarations to force the type size and formatting to a style other than what would normally be used.
For example, to get a superscript that is the same size as the running text:
As another example, the limits on a summation symbol are normally placed below and above the symbol in display style and in normal sub and superscript position in textstyle. One could force the below/above placement in running text by using:
although it should be noted that this might cause LaTeX to leave extra space between the text lines which might not be desirable.
LaTeX 2.09 fonts
The regular type style declarations can be used in math mode. They affect only letters (including upper case Greek letters) but not symbols (or lower case Greek letters). Two additional style declarations which can be used only in math mode are
The former is math italic style; it spaces letters as if they were words, however, not as if they were each separate math symbols. The latter produces upper case calligraphic letters.
LaTeX2e math fonts
The following commands change the style only of letters, numbers, and uppercase Greek.
- \mathit - same as \mit in 2.09 (see above)
- \mathrm - Roman
- \mathbf - Bold face
- \mathsf - San Serif
- \mathtt - Typewriter style
- \mathcal - Calligraphic
All of these produce spacing appropriate for text; they do not interpret each letter as a separate math symbol.
The \boldmath declaration causes everything (including symbols) in a formula to be in a bold font. Note that this differs somewhat from the same declaration in 2.09 which did not affect some symbols.
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