standard base sigma factor deisenroth = σd = e^(2*ln(µari/µgeo))^0,5

X/µ = σ(ϕ;n) = σd^±√(-ln(ϕ)n) = standard base sigma^zeta(phi) = sigma factor distribution deisenroth σcp= sigma factor cumulative product = xgeo/µgeo*sd = sigma cum product deisenroth ϕ(X/µ;n>1) = ϕ(σ;n) = e^(-n*((ln(x/µ))/(ln (σd))²) = phi factor normal distribution deisenroth ϕcp(xgeo*sd) = sigma cum product deisenroth σd = e^(2*ln(µari/µgeo))^0,5 = standard base sigma factor deisenroth = wahrer standardstreufaktor sigma deisenroth = standard basis sigma faktor deisenroth