post link to sagemath cloud website
modernize some worksheets
Wrote lecture 13 on continued fractions.
update lecture 13 based on class.
add to the faq
update faq
write lecture 14 -- rational reconstruction -- for May 1, 2013.
add a plan.
added link to homework 5 google doc form.
info about histogram
update lecture based on class
Merge branch 'master' of https://github.com/williamstein/2013-480
add link to lecture 14 video
fix link error (reported by Rebecca Hoberg)
write lectuer 15
Merge branch 'master' of https://github.com/williamstein/2013-480
update lecture based on class
link to live recording
working on lecture 16
finished lecture 16 on crypto....