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Chapter 7. Fonts and Encodings > 7.4. Using fonts in math

7.4. Using fonts in math

Unlike the situation in text, automatic changes in font shapes are generally not desired in math formulas. For mathematicians, individual shapes convey specific information. For example, bold upright letters may represent vectors. If the characters in a formula were to change because of surrounding conditions, the result would be incorrect. For this reason handling of fonts in mathematical formulas is different than that in text.

Characters in a formula can be loosely put into two classes: symbols and alphabet characters (including digits). Internally, (La)TeX distinguishes between eight types of math characters (to account for appropriate spacing), but for the discussion of fonts the division into two classes is generally adequate.


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