·

σ (EN)
bokstav, symbol

bokstav “σ”

σ, sigma
  1. den artonde bokstaven i det grekiska alfabetet, gemen sigma
    In Greek language classes, students learn that σ is the lowercase form of sigma.

symbol “σ”

σ
  1. (matematik) en symbol som representerar standardavvikelse i statistik
    The statistician calculated σ to understand how the data varied from the mean.
  2. (fysik) en symbol som representerar elektrisk konduktivitet
    The electrical conductivity σ increases with temperature in this material.
  3. (fysik) en symbol som representerar tvärsnittsarea
    The scattering cross-section σ is crucial in nuclear physics experiments.