Addition of LaTeX and better support of SI prefixes on units module

[cousteaulecommandant]

Since maybe the developers are reluctant to implement the "metrology" module I submitted in #9763, when there's already a "units" module that has the same purpose, I'm trying to port the LaTeX capabilities to the already existing "units" module.

TO DO: Complete the latexdict list of units and LaTeX representation (if a unit isn't there, its symbol will be replaced by its name)

Also, I'm implementing an easier way to use SI prefixes on the units module. The patch I submitted in #9759 wasn't very intuitive (you had to type "units.length.meter.kilo"), partly because I didn't know very well how did that module work. This new version allows you to simply type "units.length.kilometer" (even if it's not tab-completed) and it will do the rest.

CC: @williamstein @eviatarbach

Component: symbolics

Keywords: latex, SI prefixes, units, sd40.5

Author: Javier Mora

Issue created by migration from https://trac.sagemath.org/ticket/9778

[cousteaulecommandant]

Attachment: trac_9778_latex_prefixes_units.patch.gz

Adds LaTeX symbols and SI prefixes to the units module

[kcrisman]

comment:2

Is the "todo" necessary, or could it be postponed to another ticket?

[cousteaulecommandant]

comment:3

Well, latexdict only contains a few units (10) and prefixes (5) so that it worked as an example; it would need to be completed with the names of all SI units and prefixes, at least for the LaTeX representation part.

By the way, I made this patch 2 years ago so I remember pretty little of it.

[kcrisman]

comment:4

This supersedes #9759.

If someone wanted to complete this, they'd just have to make sure they implemented all the SI units etc. that Sage supports (see the 'todo' above).

[kcrisman]

Changed keywords from latex, SI prefixes, units to latex, SI prefixes, units, sd40.5