Template:Vec

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

Parameters

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: ${\vec {A}}$ .

Examples

No {{math}}

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→

Including {{math}}

Illustration of all possibilities for italic A:

	Default	Overarrow	Underarrow
Default	$A \to$	$A \to$	$A \to$
Left	$A \leftarrow$	$A \leftarrow$	$A \leftarrow$
Right	$A \to$	$A \to$	$A \to$
Double	$A \leftrightarrow$	$A \leftrightarrow$	$A \leftrightarrow$

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 \to = \nabla \to \times u \to

Tangential velocity in rigid body dynamics:

v \to = ω \to \times r \to

Rotating reference frame:

d A' \to ⁄ d t = d A \to ⁄ d t - ω \to \times A \to

d A' \to / d t = d A \to / d t - ω \to \times A \to

See also

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	elementary arithmetic precision precision1 value
Numeral systems	base 36 binary dec2hex decimal2Base duodecimal hex2dec hexadecimal octal quaternary quinary rn roman senary ternary vigesimal

Conversions

bbl to t	barrels of oil to tonnes
convert
convert/scale	to convert any linearly related units
long ton	long hundredweights, quarters and pounds to kilograms; long tons and hundredweights to pounds and metric tonnes
convinfobox	for use in infoboxes
decdeg	degrees, minutes, and seconds to decimal degrees

hms2deg	hour angle (in hours, 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)
inflation	to calculate inflation of Consumer Price Index-related prices
miles-chains	miles and chains to kilometres linking "chains"
pop density	density of a population in an area
track gauge	railway track gauges

Notation

bigmath	for stand-alone formulas, using a bigger font to match `\displaystyle` PNG-rendered TeX formulas
bra-ket braket bra ket	bra–ket notation
frac	for creating fractions (this template should NOT be used in science or mathematical articles: `{{sfrac}}` should be used instead)
intmath	integral symbols
langle rangle	angular brackets
ldelim rdelim	multiline delimiters (2-5 lines inclusive)
math	for inline formulas, to get a better matching font size and vertical alignment than with `\textstyle` (or the `\scriptstyle` kludge) PNG-rendered TeX formulas
mathcal	[mathematical] calligraphic font for use in mathematical formulas, as an alternative to `\mathcal{...}` in LaTeX markup

mvar	a short form to refer to individual italicized maths variables in normal text
overset underset	arbitrary characters/diacritics set above/below one another
radic
sfrac	for creating fractions (this template MUST be used in science or mathematical articles)
sqrt
su sub sup
tmath	wraps a TeX math expression in <math> tags
val	to report measurement values, uncertainties and units
vec	for various overarrows, underarrows, pointing left, right or both ways

Boxes
Tags
Notices

Boxes	Tags	Notices

calculation results calculus Infobox mathematics function functions	metricate undue precision units attention	calculation

The above documentation is transcluded from Template:Vec/doc.
Editors can experiment in this template's sandbox and testcases pages.
Add categories to the /doc subpage. Subpages of this template.

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