Template:Sp

The following documentation is located at Template:Sp/doc. [<Edit> Template:Sp/doc]
[⧼Purge⧽ Template:Sp]

The {{sp}} (space) typographical template inserts an horizontal space of a given [negative, null or positive] width. Negative width “spaces” are especially useful for kerning in mathematical expressions.

Usage

{{sp}} (HTML+CSS 4mu space by default)

or

{{sp|format}} (4mu space by default)

or

{{sp|width descriptor}}

or

{{sp|width descriptor|format}}

where

the first parameter (width descriptor) describes the space width (default: 4, i.e. 4mu, corresponding to a medium space) (see space width);
the last parameter (format) is taken from:
- htm (default): to get a HTML+CSS Unicode space (of a given width) character (or a );
- tex: to get a $L a T e X$ space (of a given width) command.

You may use this template within the {{math}} template, but not within the <math>...</math> element.

Issue with HTML+CSS negative spaces

A previous version had HTML+CSS negative spaces implemented with e.g.  for a -2mu (-1/9em) negative space, which was actually working in the examples.

There was a problem (not anymore?!) with the {{sum}} and {{prod}} templates though:

{{math|{{sum|''m''{{sp|1}}{{=}}1|''n''|''F''{{sub|''m''}}}}|&}} yields

∑

n

m = 1

Fm

{{math|{{prod|''m''{{sp|1}}{{=}}1|''n''|''F''<span style{{=}}"margin-left: {{#expr: -1/9}}em;"></span>{{sub|''m''}}}}|&}}

yields 

∏

n

m = 1

Fm

Actually, there was a problem (not anymore?!) when I had implemented a HTML+CSS 1mu (1/18 em) space as  since I didn't find a Unicode point for a 1/18em space, so I was using the Unicode point for a 1.5mu (1/12em) hair space instead:

{{math|{{sum|''i''{{=}}1|''n''|''i''}}|&}} yields

∑

n

i = 1

i

{{math|{{prod|''i''{{=}}1|''n''|''i''}}|&}} yields

∏

n

i = 1

i

Space width

Space width descriptors
*(Italicized descriptors cannot be used as arguments.)*
mu	em	Descriptors
`-36`	`-2 em`	`negqquad`
`-18`	`-1 em`	`negem` or `negquad`
`-9`	`-1/2 em`	`negen`
`-8`	`-4/9 em`
`-7`	`-7/18 em`
`-6`	`-1/3 em`	`negverythick`
`-5`	`-5/18 em`	`negthick`
`-4`	`-2/9 em`	`negmed`
`-3`	`-1/6 em`	`negthin`
`-2`	`-1/9 em`	`negverythin`
`-1.5`	`-1/12 em`	`neghair`
`-1`	`-1/18 em`	`negveryverythin`
`0`	`0 em`	`null`
`1`	`1/18 em`	`veryverythin`
`1.5`	`1/12 em`	`hair`
`2`	`1/9 em`	`verythin`
`3`	`1/6 em`	`thin`
`4`	`2/9 em`	`med`
`5`	`5/18 em`	`thick`
`6`	`1/3 em`	`verythick`
`7`	`7/18 em`
`8`	`4/9 em`
`9`	`1/2 em`	`en`
`18`	`1 em`	`em` or `quad`
`36`	`2 em`	`qquad`

Examples

Kerning

The code

: {{math|''a''{{sp|1}}(''n'')|&}} is divisible by {{math|''F''{{sub|''n''}}|&}} since

yields the text style HTML+CSS (without kerning)

a (n)

is divisible by 

Fn

since

The code

: {{math|''a''{{sp|1}}(''n'')|&}} is divisible by {{math|''F''{{sp|-3}}{{sub|''n''}}|&}} since

yields the text style HTML+CSS (with -3mu kerning)

a (n)

is divisible by 

Fn

since

The code

: {{math|''a''{{sp|1|tex}}(''n'')|$}} is divisible by {{math|''F''{{sub|''n''|tex}}|$}} since

yields the text style $L a T e X$

\textstyle {a{\;\;\!\!\!}(n)}

is divisible by

\textstyle {F_{n}{\!\,\!}}

since

HTML+CSS examples

The code

<span style="background: #f2f2f2;">Read on{{sp|-36}}after a -36 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-2 em}}after a -2 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|negqquad}}after a negqquad space.</span>{{nl}}

<span style="background: #f2f2f2;">Read onMafter a negem space.</span> ''(The negem space should have the width of <s>capital M</s> two capital N.)''{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-18}}after a -18 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-1 em}}after a -1 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|negem}}after a negem space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|negquad}}after a negquad space.</span>{{nl}}

<span style="background: #f2f2f2;">Read onNafter a negen space.</span> ''(The negen space should have the width of capital N.)''{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-9}}after a -9 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-1/2 em}}after a -1/2 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|negen}}after an negen space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|-6}}after a -6 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-1/3 em}}after a -1/3 em space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|-5}}after a -5 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-5/18 em}}after a -5/18 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|negthick}}after a negthick space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|-4}}after a -4 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-2/9 em}}after a -2/9 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|negmed}}after a negmed space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|-3}}after a -3 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-1/6 em}}after a -1/6 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|negthin}}after a negthin space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|-2}}after a -2 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-1/9 em}}after a -1/9 em space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|-1.5}}after a -1.5 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-1/12 em}}after a -1/12 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|neghair}}after a neghair space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|-1}}after a -1 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|-1/18 em}}after a -1/18 em space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|0}}after a 0 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|null}}after a null space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|1}}after a 1 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|1/18 em}}after a 1/18 em space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|1.5}}after a 1.5 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|1/12 em}}after a 1/12 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|hair}}after a hair space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|2}}after a 2 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|1/9 em}}after a 1/9 em space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|3}}after a 3 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|1/6 em}}after a 1/6 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|thin}}after a thin space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|4}}after a 4 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|2/9 em}}after a 2/9 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|med}}after a med space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|5}}after a 5 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|5/18 em}}after a 5/18 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|thick}}after a thick space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|6}}after a 6 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|1/3 em}}after a 1/3 em space.</span>{{nl}}

<span style="background: #f2f2f2;">Read onNafter an en space.</span> ''(The en space should have the width of capital N.)''{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|9}}after a 9 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|1/2 em}}after a 1/2 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|en}}after an en space.</span>{{nl}}

<span style="background: #f2f2f2;">Read onMafter an em space.</span> ''(The em space should have the width of <s>capital M</s> two capital N.)''{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|18}}after a 18 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|1 em}}after a 1 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|em}}after an em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|quad}}after a quad space.</span>{{nl}}

<span style="background: #f2f2f2;">Read on{{sp|36}}after a 36 mu space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|2 em}}after a 2 em space.</span>{{nl}}
<span style="background: #f2f2f2;">Read on{{sp|qquad}}after a qquad space.</span>

yields the HTML+CSS formatted

Read onafter a -36 mu space.
Read onafter a -2 em space.
Read onafter a negqquad space.

Read onMafter a negem space. (The negem space should have the width of ~~capital M~~ two capital N.)
Read onafter a -18 mu space.
Read onafter a -1 em space.
Read onafter a negem space.
Read onafter a negquad space.

Read onNafter a negen space. (The negen space should have the width of capital N.)
Read onafter a -9 mu space.
Read onafter a -1/2 em space.
Read onafter an negen space.

Read onafter a -6 mu space.
Read onafter a -1/3 em space.

Read onafter a -5 mu space.
Read onafter a -5/18 em space.
Read onafter a negthick space.

Read onafter a -4 mu space.
Read onafter a -2/9 em space.
Read onafter a negmed space.

Read onafter a -3 mu space.
Read onafter a -1/6 em space.
Read onafter a negthin space.

Read onafter a -2 mu space.
Read onafter a -1/9 em space.

Read onafter a -1.5 mu space.
Read onafter a -1/12 em space.
Read onafter a neghair space.

Read onafter a -1 mu space.
Read onafter a -1/18 em space.

Read onafter a 0 mu space.
Read onafter a null space.

Read on after a 1 mu space.
Read on after a 1/18 em space.

Read on after a 1.5 mu space.
Read on after a 1/12 em space.
Read on after a hair space.

Read on after a 2 mu space.
Read on after a 1/9 em space.

Read on after a 3 mu space.
Read on after a 1/6 em space.
Read on after a thin space.

Read on after a 4 mu space.
Read on after a 2/9 em space.
Read on after a med space.

Read on  after a 5 mu space.
Read on  after a 5/18 em space.
Read on  after a thick space.

Read on after a 6 mu space.
Read on after a 1/3 em space.

Read onNafter an en space. (The en space should have the width of capital N.)
Read on after a 9 mu space.
Read on after a 1/2 em space.
Read on after an en space.

Read onMafter an em space. (The em space should have the width of ~~capital M~~ two capital N.)
Read on after a 18 mu space.
Read on after a 1 em space.
Read on after an em space.
Read on after a quad space.

Read on after a 36 mu space.
Read on after a 2 em space.
Read on after a qquad space.

$L a T e X$ examples

The code

{{math| \text{Read onMafter an em space. (The negem space should have the width of two capital N.)} |$}}{{nl}}
{{math| \text{Read on}{{sp|-36|tex}}\text{after a } -36 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-2 em|tex}}\text{after a } -2 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|negqquad|tex}}\text{after a negqquad space.} |$}}{{nl}}

{{math| \text{Read onMafter an em space. (The negen space should have the width of capital N.)} |$}}{{nl}}
{{math| \text{Read on}{{sp|-18|tex}}\text{after a } -18 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-1 em|tex}}\text{after a } -1 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|negem|tex}}\text{after an negem space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|negquad|tex}}\text{after a negquad space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|-9|tex}}\text{after a } -9 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-1/2 em|tex}}\text{after a } -1/2 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|negen|tex}}\text{after an negen space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|-6|tex}}\text{after a } -6 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-1/3 em|tex}}\text{after a } -1/3 \text{ em space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|-5|tex}}\text{after a } -5 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-5/18 em|tex}}\text{after a } -5/18 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|negthick|tex}}\text{after a negthick space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|-4|tex}}\text{after a } -4 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-2/9 em|tex}}\text{after a } -2/9 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|negmed|tex}}\text{after a negmed space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|-3|tex}}\text{after a } -3 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-1/6 em|tex}}\text{after a } -1/6 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|negthin|tex}}\text{after a negthin space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|-2|tex}}\text{after a } -2 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-1/9 em|tex}}\text{after a } -1/9 \text{ em space.} |$}}{{nl}}

{{math| \text{Implemented as } -1 \text{ mu, since don't know how to make } -1.5 \text{ mu.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-1.5|tex}}\text{after a } -1.5 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-1/12 em|tex}}\text{after a } -1/12 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|neghair|tex}}\text{after a neghair space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|-1|tex}}\text{after a } -1 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|-1/18 em|tex}}\text{after a } -1/18 \text{ em space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|0|tex}}\text{after a } 0 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|null|tex}}\text{after a null space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|1|tex}}\text{after a } 1 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|1/18 em|tex}}\text{after a } 1/18 \text{ em space.} |$}}{{nl}}

{{math| \text{Implemented as } 1 \text{ mu, since don't know how to make } 1.5 \text{ mu.} |$}}{{nl}}
{{math| \text{Read on}{{sp|1.5|tex}}\text{after a } 1.5 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|1/12 em|tex}}\text{after a } 1/12 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|hair|tex}}\text{after a hair space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|2|tex}}\text{after a } 2 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|1/9 em|tex}}\text{after a } 1/9 \text{ em space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|3|tex}}\text{after a } 3 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|1/6 em|tex}}\text{after a } 1/6 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|thin|tex}}\text{after a thin space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|4|tex}}\text{after a } 4 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|2/9 em|tex}}\text{after a } 2/9 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|med|tex}}\text{after a med space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|5|tex}}\text{after a } 5 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|5/18 em|tex}}\text{after a } 5/18 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|thick|tex}}\text{after a thick space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|6|tex}}\text{after a } 6 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|1/3 em|tex}}\text{after a } 1/3 \text{ em space.} |$}}{{nl}}

{{math| \text{Read onNafter an en space. (The en space should have the width of capital N.)} |$}}{{nl}}
{{math| \text{Read on}{{sp|9|tex}}\text{after a } 9 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|1/2 em|tex}}\text{after a } 1/2 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|en|tex}}\text{after an en space.} |$}}{{nl}}

{{math| \text{Read onMafter an em space. (The em space should have the width of two capital N.)} |$}}{{nl}}
{{math| \text{Read on}{{sp|18|tex}}\text{after a } 18 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|1 em|tex}}\text{after a } 1 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|em|tex}}\text{after an em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|quad|tex}}\text{after a quad space.} |$}}{{nl}}

{{math| \text{Read on}{{sp|36|tex}}\text{after a } 36 \text{ mu space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|2 em|tex}}\text{after a } 2 \text{ em space.} |$}}{{nl}}
{{math| \text{Read on}{{sp|qquad|tex}}\text{after a qquad space.} |$}}

yields the $L a T e X$ formatted $\textstyle {\text{Read onMafter an em space. (The negem space should have the width of two capital N.)}}$
$\textstyle {{\text{Read on}}{\!\!\!\!\!\!\!\!\!\!\!\!}{\text{after a }}-36{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\!\!\!\!\!\!\!\!\!\!\!\!}{\text{after a }}-2{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\!\!\!\!\!\!\!\!\!\!\!\!}{\text{after a negqquad space.}}}$
$\textstyle {\text{Read onMafter an em space. (The negen space should have the width of capital N.)}}$
$\textstyle {{\text{Read on}}{\!\!\!\!\!\!}{\text{after a }}-18{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\!\!\!\!\!\!}{\text{after a }}-1{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\!\!\!\!\!\!}{\text{after an negem space.}}}$
$\textstyle {{\text{Read on}}{\!\!\!\!\!\!}{\text{after a negquad space.}}}$
$\textstyle {{\text{Read on}}{\!\!\!}{\text{after a }}-9{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\!\!\!}{\text{after a }}-1/2{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\!\!\!}{\text{after an negen space.}}}$
$\textstyle {{\text{Read on}}{\!\!}{\text{after a }}-6{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\!\!}{\text{after a }}-1/3{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!\!\!}{\text{after a }}-5{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!\!\!}{\text{after a }}-5/18{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!\!\!}{\text{after a negthick space.}}}$
$\textstyle {{\text{Read on}}{\;\;\;\;\!\!\!\!\!\!\!\!}{\text{after a }}-4{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;\;\;\;\!\!\!\!\!\!\!\!}{\text{after a }}-2/9{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\;\;\;\;\!\!\!\!\!\!\!\!}{\text{after a negmed space.}}}$
$\textstyle {{\text{Read on}}{\!}{\text{after a }}-3{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\!}{\text{after a }}-1/6{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\!}{\text{after a negthin space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!\!}{\text{after a }}-2{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!\!}{\text{after a }}-1/9{\text{ em space.}}}$
$\textstyle {{\text{Implemented as }}-1{\text{ mu, since we do not know how to make }}-1.5{\text{ mu.}}}$
$\textstyle {{\text{Read on}}{\;\!\!}{\text{after a }}-1.5{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;\!\!}{\text{after a }}-1/12{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\;\!\!}{\text{after a neghair space.}}}$
$\textstyle {{\text{Read on}}{\;\!\!}{\text{after a }}-1{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;\!\!}{\text{after a }}-1/18{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\,\!}{\text{after a }}0{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\,\!}{\text{after a null space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!}{\text{after a }}1{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!}{\text{after a }}1/18{\text{ em space.}}}$
$\textstyle {{\text{Implemented as }}1{\text{ mu, since we do not know how to make }}1.5{\text{ mu.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!}{\text{after a }}1.5{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!}{\text{after a }}1/12{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!\!}{\text{after a hair space.}}}$
$\textstyle {{\text{Read on}}{\;\!}{\text{after a }}2{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;\!}{\text{after a }}1/9{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\,}{\text{after a }}3{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\,}{\text{after a }}1/6{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\,}{\text{after a thin space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!}{\text{after a }}4{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!}{\text{after a }}2/9{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\;\;\!\!}{\text{after a med space.}}}$
$\textstyle {{\text{Read on}}{\;}{\text{after a }}5{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\;}{\text{after a }}5/18{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\;}{\text{after a thick space.}}}$
$\textstyle {{\text{Read on}}{\,\,}{\text{after a }}6{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\,\,}{\text{after a }}1/3{\text{ em space.}}}$
$\textstyle {\text{Read onNafter an en space. (The en space should have the width of capital N.)}}$
$\textstyle {{\text{Read on}}{\,\,\,}{\text{after a }}9{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\,\,\,}{\text{after a }}1/2{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\,\,\,}{\text{after an en space.}}}$
$\textstyle {\text{Read onMafter an em space. (The em space should have the width of two capital N.)}}$
$\textstyle {{\text{Read on}}{\quad }{\text{after a }}18{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\quad }{\text{after a }}1{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\quad }{\text{after an em space.}}}$
$\textstyle {{\text{Read on}}{\quad }{\text{after a quad space.}}}$
$\textstyle {{\text{Read on}}{\qquad }{\text{after a }}36{\text{ mu space.}}}$
$\textstyle {{\text{Read on}}{\qquad }{\text{after a }}2{\text{ em space.}}}$
$\textstyle {{\text{Read on}}{\qquad }{\text{after a qquad space.}}}$