Sigma notation

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Sigma Pi, Sigma AB, Mu Sigma, Sigma baryon, Sigma Pi (literary society), Alpha Sigma Phi (Philippines), Sigma SD15, Sigma-class design, Ferrari Sigma, Sigma dp0 Quattro, Gnome Sigma, List of Delta Sigma Pi chapters, Sigma fp, Sigma dp2 Quattro, Phi Kappa Sigma, Sigma SD10, Elitar Sigma, Sigma Guitars, Sigma Sigma–Delta Chi Fraternity House, Sigma SD9, General Motors Sigma platform, List of Sigma Alpha Mu chapters, Anti-sigma factors, Team IG–Sigma Sport, Alpha Sigma Nu, Sigma Alpha Mu, Sigma Octantis, Sigma Seven, Space Emperor God Sigma, Sigma-1 receptor, Sigma DP1x, G.I. Joe: Sigma 6, List of Alpha Sigma Phi chapters, Sigma Kappa, Chrysler Sigma, SK Sigma Olomouc, Sigma discography, Non-linear sigma model, Pi Kappa Sigma, Sigma Alpha Delta, Sigma, Virginia, Alpha Sigma Tau, List of Kappa Sigma members, Life (Sigma album), Phi Sigma Epsilon, Sigma Alpha Epsilon, Delta Sigma, Pi Sigma, Delta Sigma (sorority), Sigma DP2x

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