Re: Insert for each symbol (upside down A) in an emacs text document

[Patricia J. Hawkins]

>>>>> "AC" == Angus Comber <anguscomber@gmail.com> writes:

AC> I am writing up some mathematical documents and would like to use the for
AC> all (upside down A) and there exists symbol (backwards E).

AC> Firstly, how do I insert these symbols?

Quick & dirty way, if it's just a few characters, is just to find them
on the web, copy and paste, save to file, keep the file open in a
window, and then copy and paste when you need them.  From
https://en.wikipedia.org/wiki/List_of_logic_symbols:

∀∃

AC> Secondly, can I insert into a text document?  Or does it have to be a
AC> unicode document?

Your text file is already using unicode.  Nothing defaults to ASCII
anymore. 

AC> Thirdly, will the symbols be visible in the document when viewing on -
AC> screen??

If it survives the initial cut and paste from the web to your Emacs
file, it should be fine.  (Notice that the symbols in the TEX column
here: https://en.wikipedia.org/wiki/List_of_mathematical_symbols don't
survive!) 

Now, there are ways to assign things to keys, or keystroke combinations;
and further, there are also systems like SWEAVE and Auctex to let you write
complicated equations, but this should get you started.

-- 
Patricia J. Hawkins