This is a "storage" package used by completion engines such as
`company-math.el` and `ac-math.el`.

Defined (a)lists are:

 `math-symbol-list-basic`
 `math-symbol-list-extended`
 `math-symbol-list-packages`
 `math-symbol-list-latex-commands`
 `math-symbol-list-subscripts`
 `math-symbol-list-superscripts`

Sources:

 [1] http://milde.users.sourceforge.net/LUCR/Math/
 [2] https://github.com/wspr/unicode-math/blob/master/unicode-math-table.tex
 [3] http://milde.users.sourceforge.net/LUCR/Math/data/unimathsymbols.txt
 [4] M-x describe-input-method TeX
 [5] `LaTeX-math-default' in AucTeX package
 [6] LaTeX 2 unicode: https://www.cl.cam.ac.uk/%7Emgk25/ucs/examples/TeX.txt
 [7] W3C math WG: https://www.w3.org/2003/entities/2007xml/unicode.xml

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