Sigma is the upper case letter S in Greek. And S stands for S um. I love Sigma, it is fun to use, and can do many clever things. So means to sum things up ... Sum whatever is after the Sigma:

Sigma notation (which is also known as summation notation) is the easiest way of writing a smaller or longer sum using the sigma symbol ∑, the general formula of the terms, and the index.

To write a sum in sigma notation, try to find a formula involving a variable k where the first term can be obtained by setting k = 1, the second term by k = 2, and so on.

The summation of a specified number of terms of a sequence (a series) can also be represented in a compact form, called summation notation, or sigma notation. The Greek capital letter sigma , , is …

Sigma notation is a structured way to write large sums concisely. It uses the symbol ∑ and typically looks like ∑ i = 1 n a i, meaning to sum the terms a 1 through a n using the specified sequence or …

2. Calculating with sigma notation to simplify our calculations. To do that, we wil need to know some basic sums. First, let's ta k about the sum of a constant. (Notice here, that our upper limit of …

Dec 12, 2025 · Explore sigma notation with clear definitions, formulas, properties, and solved examples. Great for students and math learners.

May 16, 2025 · This guide covers Sigma notation in Algebra I, detailing notation rules, evaluation methods, key properties, and guided example problems.

To facilitate the writing of lengthy sums, a shorthand notation, called summation notation or sigma notation is used. ∑i=1n f(i) = f(1) + f(2) + ⋯ + f(n).

The symbol Σ (capital sigma) is often used as shorthand notation to indicate the sum of a number of similar terms. Sigma notation is used extensively in statistics.