Sigma Notation
Sigma Notation is a mathematical notation used to represent the sum of a sequence of numbers. It uses the Greek letter Σ (sigma) to indicate that you are adding up a series of terms. The notation typically includes an index variable, a lower limit, an upper limit, and a formula that defines the terms being summed. For example, Σ from i=1 to n of a_i means you sum the values of a_i from i=1 to n.
This notation simplifies the expression of long sums and makes it easier to work with sequences and series in mathematics. It is commonly used in various fields, including calculus, statistics, and computer science, to analyze patterns and perform calculations efficiently.