Who discovered summation?

Summation, as a mathematical concept, does not have a single discoverer; it has been used in various forms for thousands of years. Ancient civilizations, including the Babylonians and Greeks, employed summation techniques for counting and calculations. The formal notation and understanding of summation evolved over time, with significant contributions from mathematicians like Isaac newton and Leonhard Euler in the 17th and 18th centuries. Today, the sigma notation (Σ) commonly represents summation, popularized by these earlier mathematicians.