Symbols:H
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.
A variant symbol for celestial altitude is $h$.
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 $\mathrm {hm}$:
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 $n$:
- $\ds \forall n \in \Z, n \ge 0: H_n = \sum_{k \mathop = 1}^n \frac 1 k$
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:
- $\ds \map {H^{\paren r} } n = \sum_{k \mathop = 1}^n \frac 1 {k^r}$
The $\LaTeX$ code for \(H_n^{\paren r}\) is H_n^{\paren r} .
Planck's Constant
- $h$
The symbol for Planck's constant is $h$.
The $\LaTeX$ code for \(h\) is h .
Reduced Planck Constant
- $\hbar$
The symbol for the reduced Planck constant is $\hbar$.
The $\LaTeX$ code for \(\hbar\) is \hbar .
Magnetic Field Strength
- $\mathbf H$
The usual symbol used to denote magnetic field strength is $\mathbf H$.
Its $\LaTeX$ code is \mathbf H .
Set of Quaternions
- $\Bbb H$
The set of quaternions.
The $\LaTeX$ code for \(\mathbb H\) is \mathbb H or \Bbb H.
Null Hypothesis
- $H_0$
Used to denote the null hypothesis:
In the context of a hypothesis test, the null hypothesis, usually denoted $H_0$ or $\mathrm H_0$, is the hypothesis which has been proposed for investigation.
The $\LaTeX$ code for \(H_0\) is H_0 .
Alternative Hypothesis
- $H_1$
Used to denote the alternative hypothesis:
In the context of a hypothesis test, the alternative hypothesis, usually denoted $H_1$ or $\mathrm H_1$, is the hypothesis which is to be accepted if the null hypothesis is demonstrated not to hold.
The $\LaTeX$ code for \(H_1\) is H_1 .
Hour
- $\mathrm {hr}$
The symbol for the hour is $\mathrm {hr}$.
The $\LaTeX$ code for \(\mathrm {hr}\) is \mathrm {hr} .
Hour: Also presented as
Some sources present the symbol for the hour as $\mathrm h$.
Its $\LaTeX$ code is \mathrm h .
Hour Angle
- $\mathrm {HA}$
Used as an abbreviation and to denote the hour angle.
Let $P$ be a point on the celestial sphere.
The hour angle of $P$ is the angular distance measured westwards along the celestial equator from the vernal equinox.
That is, it is the angular distance measured westwards along the celestial equator between the observer's meridian and the hour circle of $P$.
The $\LaTeX$ code for \(\mathrm {HA}\) is \mathrm {HA} .
Hertz
- $\mathrm {Hz}$
The symbol for the hertz is $\mathrm {Hz}$.
Its $\LaTeX$ code is \mathrm {Hz} .
Henry
- $\mathrm H$
The symbol for the henry is $\mathrm H$.
Its $\LaTeX$ code is \mathrm H .
Horsepower
- $\mathrm {hp}$
The symbol for the horsepower is $\mathrm {hp}$.
The $\LaTeX$ code for \(\mathrm {hp}\) is \mathrm {hp} .
Horsepower-Hour
- $\mathrm {hp \, h}$
The symbol for the horsepower-hour is $\mathrm {hp \, h}$.
The $\LaTeX$ code for \(\mathrm {hp \, h}\) is \mathrm {hp \, h} .
Hectobar
- $\mathrm {hbar}$
The symbol for the hectobar is $\mathrm {hbar}$.
The $\LaTeX$ code for \(\mathrm {hbar}\) is \mathrm {hbar} .