Noun:

গ্রীক বর্ণমালার অষ্টাদশ অক্ষর,

sigma's Usage Examples:

μ σ ) 2 {\displaystyle f(x)={\frac {1}{\sigma {\sqrt {2\pi }}}}e^{-{\frac {1}{2}}\left({\frac {x-\mu }{\sigma }}\right)^{2}}} The parameter μ {\displaystyle.

represented in mathematical texts and equations by the lower case Greek letter sigma σ, for the population standard deviation, or the Latin letter s, for the.

variable with itself, and it is often represented by σ 2 {\displaystyle \sigma ^{2}} , s 2 {\displaystyle s^{2}} , or Var ⁡ ( X ) {\displaystyle \operatorname.

{\displaystyle \sigma _{\bar {x}}^{2}=\sum _{i=1}^{n}{w_{i}'^{2}\sigma _{i}^{2}}={\frac {\sum _{i=1}^{n}{\sigma _{i}^{-4}\sigma _{i}^{2}}}{\left(\sum.

_{Y}\end{pmatrix}},\quad {\boldsymbol {\Sigma }}={\begin{pmatrix}\sigma _{X}^{2}'\rho \sigma _{X}\sigma _{Y}\\\rho \sigma _{X}\sigma _{Y}'\sigma _{Y}^{2}\end{pmatrix}}.

{\boldsymbol {\sigma }}\,=\,{\begin{bmatrix}\sigma _{11}'\sigma _{12}'\sigma _{13}\\\sigma _{21}'\sigma _{22}'\sigma _{23}\\\sigma _{31}'\sigma _{32}'\sigma _{33}\end{bmatrix}}}.

{\displaystyle \varepsilon _{A}\eta _{B}+\varepsilon _{A}\,\sigma _{B}+\sigma _{A}\,\eta _{B}+\sigma _{A}\sigma _{B}\geq \left|\langle [{\hat {A}},{\hat {B}}]\rangle.

{\displaystyle P\left({\frac {L-\mu }{\sigma }}sigma }}\right)=\gamma .

∑ {\displaystyle \textstyle \sum } is an enlarged capital Greek letter sigma.

{\begin{aligned}\sigma ^{*}=f(\sigma ^{*})'\Rightarrow \sigma _{i}^{*}=f_{i}(\sigma ^{*})\\'\Rightarrow \sigma _{i}^{*}={\frac {g_{i}(\sigma ^{*})}{\sum _{a\in.

{\ln x-\mu }{\sigma }}\right){\frac {1}{\sigma x}}\\[6pt]'={\frac {1}{x\sigma {\sqrt {2\pi \,}}}}\exp \left(-{\frac {(\ln x-\mu )^{2}}{2\sigma ^{2}}}\right).

A sigma factor (σ factor or specificity factor) is a protein needed for initiation of transcription in bacteria.

The diagonal entries σ i = Σ i i {\displaystyle \sigma _{i}=\Sigma _{ii}} of Σ {\displaystyle \mathbf {\Sigma } } are known.

Synonyms:

letter of the alphabet; letter; alphabetic character; Greek alphabet;