New exercises/problems strucutre

[ivanistheone]

Hi Ian,

These are some useful macros for exercises and problems based on the answers package. Check out all_exercises.tex for "main" file.

You should probably check with MIT Press what formatting they'll need for the problems/exercises before you go too far in the creative process, but I hope this pull request will at least get you started. The original macros are public domain and GFDL licensed so should be reusable.

Sorry I can't contribute more—I'm busy writing exercises for my linear algebra book ... good idea crowdsourcing the problems... If you teach a class, maybe you can assign to your students homework to create problems?

A+,
Ivan

PS: An interesting project you should look at is this: https://ximera.osu.edu/ maybe you can use that formatting instead so all the exercises will be interactive? Haven't player with that but looks super cool.

[goodfeli]

This PR breaks make.sh; how should I compile in the new setup?

[ivanistheone]

The main file is all_exercises.tex — you can comment out different sections when working on specific chapters/parts.

Note the %!TEX root = all_exercises.tex header in the include files, which tells your latex editor which file to compile. Say you're editing 02_linear_algebra.tex and you press "CMD+SHIFT+L" to compile, this header will go and compile all_exercises.tex rather than try to compile the fragment.