> For one dollar a lottery player purchases entertainment and maybe even a bit of optimism for a little bit of time.
And above all there is gambling, the cheapest of all
luxuries. Even people on the verge of starvation can
buy a few days' hope ('Something to live for', as they
call it) by having a penny on a sweepstake.
-- George Orwell, The Road to Wigan Pier, chapter 5
It's more physics than pure maths, but artist & art critic Matthew Collings made a documentary for the BBC called "Beautiful Equations". More info here:
Since 2009 he has curated examples at http://blogs.independent.co.uk/tag/headline/