Subscript (original) (raw)
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A quantity displayed below the normal line of text (and generally in a smaller point size), as the "
" in 
, is called a subscript. Subscripts are commonly used to indicate indices (
is the entry in the 
th row and 
th column of a matrix 
), partial differentiation (
is an abbreviation for 
), and a host of other operations and notations in mathematics.
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Cite this as:
Weisstein, Eric W. "Subscript." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Subscript.html