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σ (EN)
bokstav, symbol

bokstav “σ”

σ, sigma
  1. den attende bokstaven i det greske alfabetet, liten sigma
    In Greek language classes, students learn that σ is the lowercase form of sigma.

symbol “σ”

σ
  1. (matematikk) et symbol som representerer standardavvik i statistikk
    The statistician calculated σ to understand how the data varied from the mean.
  2. (fysikk) et symbol som representerer elektrisk ledningsevne
    The electrical conductivity σ increases with temperature in this material.
  3. (fysikk) et symbol som representerer tverrsnittsareal
    The scattering cross-section σ is crucial in nuclear physics experiments.