Standard notation for sum of vector elements? - Mathematics Stack Exchange
In mathematics , summation is the addition of a sequence of any kind of numbers , called addends or summands ; the result is their sum or total. Summations of infinite sequences are called series. They involve the concept of limit , and are not considered in this article. The summation of an explicit sequence is denoted as a succession of additions. Because addition is associative and commutative , there is no need of parentheses, and the result does not depend on the order of the summands.
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