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Showing content from https://en.wikipedia.org/wiki/Template:Vec below:

Template:Vector - Wikipedia

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A→

This template creates vectors using arrow notation in HTML, as an alternative to boldface.

The template has three parameters:

Vector symbol: Insert the character, i.e. A, Ω etc. Default is A; to immediately show the template is in use, and prevent the arrow moving and overlapping text to one side.
Arrow direction: Select one of left, right, or double for the arrows →, ←, or ↔ respectively. The default is right.
Arrow position: Select one of under or over to place the arrow over or under the character symbolizing the vector. The default is over.

The defaults for 2 and 3 are set to match the LaTeX analogue of \vec: A → {\displaystyle {\vec {A}}} .

Illustration of all possibilities for italic A:

Default Overarrow Underarrow Default A→ A→ A→ Left A← A← A← Right A→ A→ A→ Double A↔ A↔ A↔

with code:

Default Overarrow Underarrow Default {{vec|''A''}} {{vec|''A''||over}} {{vec|''A''||under}} Left {{vec|''A''|left}} {{vec|''A''|left|over}} {{vec|''A''|left|under}} Right {{vec|''A''|right}} {{vec|''A''|right|over}} {{vec|''A''|right|under}} Double {{vec|''A''|double}} {{vec|''A''|double|over}} {{vec|''A''|double|under}}

Formulae:

Vorticity of a fluid with velocity field u→:

ω→ = ∇→ × u→

Tangential velocity in rigid body dynamics:

v→ = ω→ × r→

Rotating reference frame:

dA′→⁄dt = dA→⁄dt − ω→ × A→

⁠dA′→/dt⁠ = ⁠dA→/dt⁠ − ω→ × A→

Illustration of all possibilities for italic A:

Default Overarrow Underarrow Default A→ A→ A→ Left A← A← A← Right A→ A→ A→ Double A↔ A↔ A↔

with code:

Default Overarrow Underarrow Default {{math|{{vec|''A''}}}} {{math|{{vec|''A''||over}}}} {{math|{{vec|''A''||under}}}} Left {{math|{{vec|''A''|left}}}} {{math|{{vec|''A''|left|over}}}} {{math|{{vec|''A''|left|under}}}} Right {{math|{{vec|''A''|right}}}} {{math|{{vec|''A''|right|over}}}} {{math|{{vec|''A''|right|under}}}} Double {{math|{{vec|''A''|double}}}} {{math|{{vec|''A''|double|over}}}} {{math|{{vec|''A''|double|under}}}}

Formulae:

Vorticity of a fluid with velocity field u→:

ω→ = ∇→ × u→

Tangential velocity in rigid body dynamics:

v→ = ω→ × r→

Rotating reference frame:

dA′→⁄dt = dA→⁄dt − ω→ × A→

⁠dA′→/dt⁠ = ⁠dA→/dt⁠ − ω→ × A→

For quantum state vectors, see {{braket}}
For more general templates, allowing arbitrary characters and diacritics set above or below one another, see {{overset}} and {{underset}}

Math templates

Functions
Numeral systems

Functions

Numeral systems

Conversions

convert many units (see: list) cvt abbreviated {{convert}} convinfobox {{convert}} for infoboxes bbl to t barrels of oil to tonnes long ton long hundredweights, quarters and pounds to kilograms;
long tons and hundredweights to pounds and metric tons miles-chains miles and chains to kilometres linking "chains" decdeg degrees, minutes, and seconds to decimal degrees deg2dms decimal degrees to degrees, minutes, and seconds deg2hms decimal degrees to hour angle (in hours, minutes, and seconds) hms2deg hour angle (in hours, minutes, and seconds) to decimal degrees inflation calculate inflation of Consumer Price Index-related prices pop density population density in an area track gauge railway track gauges

Notation and

formatting bigmath bigger font to match TeX \displaystyle (standalone formulas only)

bra–ket notation ceil, floor calculations :mw:Help:#expr; formatting indicators ⌈3.14⌉, ⌊3.14⌋ (no calculation performed) fraction slant fractions 3⁄5 (not for maths/science articles; use standing or upright fractions {{sfrac}} instead) intmath integral symbols

multiline delimiters (2–5 lines inclusive) abs absolute values (paired vertical lines) math short text-based formulas mathcal [mathematical] calligraphic font; alternative to LaTeX \mathcal{...} mvar individual italicized maths variables in normal text

overline

underline

a line set above/below a sequence of characters overarc an arc set above a sequence of characters

overset

underset

arbitrary characters/diacritics set above/below one another pars parentheses that can be resized (∑) sfrac "standing" or upright fractions ⁠3/5⁠ (use in maths/science articles instead of{{fraction}})

sub

sup

subscripts and superscripts tmath Wrap TeX in <math> tags tombstone symbol indicating the end of a proof val measurement values, uncertainties and units vec various overarrows, underarrows, etc.

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