Back تدوين أينشتاين Arabic Eynşteyn cəmləmə qaydası Azerbaijani Conveni de sumació d'Einstein Catalan Einsteinova konvence Czech Einsteinsche Summenkonvention German Ejnŝtejna notacio Esperanto Convenio de suma de Einstein Spanish نمادگذاری اینشتین Persian Einsteinin summaussääntö Finnish Convention de sommation d'Einstein French
In mathematics, especially the usage of linear algebra in mathematical physics and differential geometry, Einstein notation (also known as the Einstein summation convention or Einstein summation notation) is a notational convention that implies summation over a set of indexed terms in a formula, thus achieving brevity. As part of mathematics it is a notational subset of Ricci calculus; however, it is often used in physics applications that do not distinguish between tangent and cotangent spaces. It was introduced to physics by Albert Einstein in 1916.