Spacing With Mathematical Symbols - AMA Manual of Style

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Contents
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Spacing With Mathematical Symbols 

Chapter:
Mathematical Composition
Author(s):

Stephen J. Lurie

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Spacing With Mathematical Symbols

Thin spaces should be used before and after the following mathematical symbols: ±, =, <, >, ≤, ≥, +, −, ÷, ×, ·, ≈, ∼, ∩, ∫, Π, Σ, and |.

a ± b a = b a + b ab a ÷ b a × b a · b a > b a < b

Symbols are set close to numbers, superscripts and subscripts, and parentheses, brackets, and braces.

2a

 

(a + b)

a2

 

[ab]

x2

 

{a + b}

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