Definition of summation notation in English:

summation notation

noun

  • The notation used to denote a series; an instance of such notation.

    Summation notion expresses series in the form Σnᵢ ₌ ₘxᵢ, where xᵢ represents the general term of the series, and the values of m and n specify respectively the starting and stopping points of the sum; e.g. Σ5 ᵢ ₌ ₃xᵢ represents the series x₃ + x₄ + x₅.

Origin

Early 20th century; earliest use found in Michigan Technic.