`@minus`

(−): Inserting a Minus Sign ¶Use the `@minus{}`

command to generate a minus sign.
Where the character encoding and font used in the output allow it,
the symbol is the customary length for a minus sign—a little longer
than a hyphen, shorter than an em-dash:

‘−’ is a minus sign generated with ‘@minus{}’, ‘-’ is a hyphen generated with the character ‘-’, ‘—’ is an em-dash for text.

If you actually want to typeset some math that does a subtraction, it
is better to use `@math`

, as in `@math{a-b}`

(see `@math`

and `@displaymath`

: Formatting Mathematics).