Symbols:H

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hecto-

$\mathrm h$

The Système Internationale d'Unités symbol for the metric scaling prefix hecto, denoting $10^{\, 2 }$, is $\mathrm { h }$.


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


Celestial Altitude

$h$


Let $X$ be a point on the celestial sphere.

The (celestial) altitude of $X$ is defined as the angle subtended by the the arc of the vertical circle through $X$ between the celestial horizon and $X$ itself.


It is usually denoted by $h$.


Subgroup

$H$

Frequently used to represent a general subgroup of a given group $G$.


Function

$\map h x$

The letter $h$, along with $f$ and $g$, is frequently used to denote a general mapping or function.


The $\LaTeX$ code for \(\map h x\) is \map h x .


Hectometre

$\mathrm {hm}$

The symbol for the hectometre is $\mathrm {hm}$:

$\mathrm h$ for hecto
$\mathrm m$ for metre.


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


Heaviside Step Function

$\map H x$

The symbol used to denote the Heaviside step function is sometimes seen as $\map H x$.


The $\LaTeX$ code for \(\map H x\) is \map H x .


Harmonic Numbers

$H_n$


The harmonic numbers are denoted $H_n$ and are defined for positive integers $n$:

$\displaystyle \forall n \in \Z, n \ge 0: H_n = \sum_{k \mathop = 1}^n \frac 1 k$


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


General Harmonic Numbers

$H_n^{\paren r} $


Let $r \in \R_{>0}$.

For $n \in \N_{> 0}$ the Harmonic numbers order $r$ are defined as follows:

$\displaystyle H_n^{\paren r} = \sum_{k \mathop = 1}^n \frac 1 {k^r}$


The $\LaTeX$ code for \(H_n^{\paren r}\) is H_n^{\paren r} .