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sign of aggregation

noun, Mathematics.
any of the signs used to indicate grouping in an algebraic expression: vinculum, bar, or raised horizontal line, ; a pair of parentheses, (a + b); a pair of brackets, [ a + b ]; or a pair of braces, { a + b }.
Origin of sign of aggregation
First recorded in 1940-45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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