Support for several LaTeX symbols (useful in science)

[Iey4iej3]

These are supported by Unicode, say:

𝔸 ℱ 𝔉

Some suggestions about the shortcuts for these symboles: F7 for \mathcal; For F8 for \mathfrak, double the letter (say AA) to produce the blackboard bold (these shortcuts are used in TeXmacs.

[Iey4iej3]

They are already supported by \mscr, \Bbb and \mfrak.

[shenlebantongying]

RIME can support 10k+ entries in one dict, we can add some alias if you think they are needed.

[Iey4iej3]

It seems reasonable to add \to as an abbrev for \rightarrow.

[shenlebantongying]

This is a good idea, I added 3 versions 6da2c87

→	\->
→	\to
⇒	\To
⇛	\TO

Feel free to suggest more :)

[Iey4iej3]

This is a good idea, I added 3 versions 6da2c87

→	\->
→	\to
⇒	\To
⇛	\TO

Feel free to suggest more :)

I would not add \To (which does not seem to be standard in LaTeX). On the other hand, there are several related which might be better included as well:

\implies = ⟹ (= \Longrightarrow)
\iff = ⟺ (= \Longleftrightarrow)

[Iey4iej3]

And also \S for §.

[Iey4iej3]

Also \bullet for •, \circ for ∘, \square for □, and \blacksquare for ■