A special feature is the name insertion. The blue square you
type into is actual a list. Furthermore, that list can contain other
lists. When you type a backslash (\
) you get a new
empty list right away. But this one is special. It uses a different
font and is meant to insert things like function names. There is,
however, a second idea here. Your keyboard only has a limited number of keys.
The wealth of mathematical symbols on the other side is overwhelming. To get one
of those you can type its name and press the space bar afterwards. The name you
typed will be replaced by the symbol then. In this context, the
Space bar means “get out of here”, that
is move the cursor to the containing list. The cursor will be
positioned at the end of what you just entered but will also enclose part of the original
formula, after pressing the space bar.
Another thing you might want to insert are spaces. We all know, printing formulae is all about the right spacing. And you can do just that using a “name list”.
Inside the blue square do: \ , SPACE
to get a small space.
Do: \ < Space
to get a medium space.
Do: \ ; Space
to get a thick space.
Do: \ quad Space
to get
a quadruple wide space.
In the same way, specific mathematical symbols can be inserted.
\ oint Space
inserts
the path integral about a closed contour. Below is the result of
\ oint Space
:
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