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The $12$th letter of the Greek alphabet.

Minuscule: $\mu$
Majuscule: $\Mu$

The $\LaTeX$ code for \(\mu\) is \mu .

The $\LaTeX$ code for \(\Mu\) is \Mu .


$\mathrm \mu$

The Système Internationale d'Unités metric scaling prefix denoting $10^{\, -6 }$.

Its $\LaTeX$ code is \mathrm {\mu} .



Often used to denote the expectation of a given random variable.

Linear Density


Used to denote the linear density of a given one-dimensional body:

$\displaystyle \mu = \frac m l$


Parameter of Poisson Distribution


Used as an alternative to $\lambda$ to denote the parameter of a given Poisson distribution.

Moment of Discrete Random Variable


Let $X$ be a discrete random variable.

Then the $n$th moment of $X$ is denoted $\mu'_n$ and defined as:

$\mu'_n = \expect {X^n}$

where $\expect {\, \cdot \,}$ denotes the expectation function.

The $\LaTeX$ code for \(\mu'_n\) is \mu'_n .