| Symbol |
Meaning |
Example |
Translation |
| $|x|$ |
absolute value |
$|-x|=x$ |
The positive value or magnitude of $x$ |
| $\Vert\vec{v}\Vert$ |
magnitude |
$\Vert\vec{v}\Vert=\sqrt{v_x^2+v_y^2}$ |
The length of a line or vector |
| $\parallel$ |
parallel |
$\vec{v}\parallel\vec{w}$ |
$\vec{v}$ is parallel to $\vec{w}$ |
| $\perp$ |
perpendicular |
$\vec{v}\perp\vec{w}$ |
$\vec{v}$ is perpendicular to $\vec{w}$ |
| $!$ |
factorial |
$5!=1\cdot 2\cdot 3\cdot 4\cdot 5$ |
The product of all integers to the specified value |
| $\therefore$ |
therefore |
$x^2=4 \therefore x= \pm 2$ |
One is true, therefore the other is true |
| $\bmod$ |
modulus |
$4 \bmod 3 = 1$ |
4/3 has a remainder of 1 |
| $\forall$ |
for all |
$\forall x≥0$ |
for every non-negative value |
| $\isin$ |
element of |
$\forall x \isin \Z$ |
$x$ is an integer |
| $\land$ |
and |
$x>0 \land y>0$ |
Both of these statements are true |
| $\lor$ |
or |
$x>0 \lor y>0$ |
One or both of these statements are true |
