# Symbols:Greek/Mu

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## Mu

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 .

## micro-

$\mathrm \mu$

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

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

### Expectation

$\mu$

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

### Linear Density

$\mu$

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

$\displaystyle \mu = \frac m l$

where:

### Parameter of Poisson Distribution

$\mu$

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

### Moment of Discrete Random Variable

$\mu'_n$

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 .