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AMA Manual of Style (10th ed.) : A Guide for Authors and Editors

AMA Manual of Style Committee

Publisher:
Oxford University Press
Print Publication Date:
Mar 2007
Print ISBN-13:
9780195176339
Published to AMA Manual of Style:
Apr 2009
DOI:
10.1093/jama/9780195176339.001.0001
© American Medical Association

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Contents

Exponents

Chapter:
Mathematical Composition
Author(s):

Stephen J. Lurie

Use of radicals may sometimes be avoided by substituting a fractional exponent: (a2−b2)1/2instead of a2−b2.As with unstacking fractions, if clarity is sacrificed by making the equation fit within the text, it is preferable to set it off. For example, E = 1.96 {[P (1 − P)]/m}1/2 fits within the text, but the centered E=1.96P(1−P)mfits within the text, but the centeredmight be more easily understood.A negative exponent denotes the reciprocal of the expression, as illustrated in these examples: x−n= 1/xn A−1 = 1/A B−2 = 1/B2A negative exponent may simplify some expressions within running text:A(x+y)2 may also be written  as  A(x+y)-2 or A/(x+y)2The term log is an abbreviation of logarithm. A system

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