Interesting article in the Guardian about the holy grails of mathematics - also know has the "millenium problems". Worth $1 million if you solve one. These include:
- Birch and Swinnerton-Dyer conjecture
- Poincaré conjecture
- Navier-Stokes equation
- P vs NP problem
- Riemann hypothesis
- Hodge conjecture
- Yang-Mills and Mass gap