Symbols:Greek/Mu
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-
- $\mu$
The Système Internationale d'Unités symbol for the metric scaling prefix micro, denoting $10^{\, -6}$, is $\mu$.
Micron
- $\mu$
Before $1967$, the micrometre $\mu \mathrm m$ was called the micron.
Its symbol was $\mu$.
Its $\LaTeX$ code is \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:
- $\mu = \dfrac m l$
where:
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 .
Micrometre
- $\mu \mathrm m$
The symbol for the micrometre is $\mu \mathrm m$.
Its $\LaTeX$ code is \mu \mathrm m .
Vacuum Permeability
- $\mu_0$
The vacuum permeability is the physical constant denoted $\mu_0$ defined as:
- $\mu_0:= \dfrac {2 \alpha h} {e^2 c}$
where:
- $e$ is the elementary charge
- $\alpha$ is the fine-structure constant
- $h$ is Planck's constant
- $c$ is the speed of light defined in $\mathrm m \, \mathrm s^{-1}$
Of the above, only the fine-structure constant $\alpha$ is a measured value; the others are defined.
It can be defined as the capability of a magnetic field to permeate a vacuum.
From Value of Vacuum Permeability, it has the value:
- $\mu_0 = 1 \cdotp 25663 \, 70621 \, 2 (19) \times 10^{-6} \, \mathrm H \, \mathrm m^{-1}$ (henries per metre)
The $\LaTeX$ code for \(\mu_0\) is \mu_0 .
Sources
- 1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics ... (previous) ... (next)