Q.How would people share notes?
A) Could be live sharing in class (etherpad for ex: http://piratepad.net/sj8l1FIUIK ), then contents of pad get transferred to a wiki and people are free to edit.
Q2.Why would people put in the effort to type-in their notes?
A2) Therein lies the trouble...
If you can think of a business model, or an incentives structure that would make this a open collaborative project, do pm me. Note: It would be against my values to put ads all over site to monetize.
To write the latex file, they worked together (sharing the same file, same idea as google docs).
And at the end, they put the effort only because they thought it was nice to have all the notes in pdf, commitment with the class, and because it was a good idea to share it with the other students. I still have all my mathematic classes pdf's.
A2 : Incentive model may always not necessarily involve monetary benefit.
PS : Check mail.
Khanacademy classes are mostly 10 min video lectures, so you can jump to any concept and learn very quickly.
One can not eat an elephant at once, but if you slice it and eat a bit everyday you'll go a long way in short period of time.
There is a lot of discussion of derivatives and partial derivatives in the course, however it's entirely possible to complete the course and feel comfortable with the material without understanding derivatives. At least, it was for me =)
As for machine learning more generally, I'm certain a greater understanding of the maths behind what's going on would make you a better practitioner. I'm sure there are plenty of people currently making their living applying ML techniques without being maths experts, but I'm also sure the leaders in the ML field are maths experts.
I'm hoping to work on cleaning it up over the next few weeks, at which point a repo might be a good idea. My only slight concern is that if every man and his dog contributes we may end up with a really thorough, in depth overview of the topics, which in one sense would be brilliant, but on the other hand would make it far more than just a simple reflection of the course.
However, that's hardly reason not to do it, and there can always be one copy in it's current, terse format, so when I get the HTML sorted I'll do that and see what happens....