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Guidelines for Equations, Units, and Mathematical Notation
There are three types of mathematical equations: (a) in-line equations, (b) displayed but unnumbered equations, and (c) displayed and numbered equations. (a) In
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Writing in Mathematics
(c) Do not confuse mathematical symbols for English words (= and # are especially common examples of this). The symbol = is used only in mathematical formulas
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SI Unit rules and style conventions checklist
A solidus (i.e., slash), horizontal line, or negative exponent is used to signify the division of units. The solidus must not be repeated on the same line
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