http://www.pragprog.com/the-pragmatic-programmer/extracts/tips

http://t-a-w.blogspot.com/2008/07/new-law-of-demeter.html

Finance mathematics:
http://www.math.ethz.ch/Finance/education/fin_edu

http://www.math.toronto.edu/jjchew/software/tsh/doc/pairing.html

http://scichess.org/faq/swiss.html

Constraint Maximization:
http://www.nada.kth.se/~viggo/problemlist/
Contains info about pricing for secret SDG.

Ising models:
Ising model in 3d. Simple mathematical model of phase transitions, e.g., when water freezes or when cooling iron becomes magnetic. Computing lowest energy state is NP-hard. Solvable in polynomial time if graph is planar, but 3d lattice is nonplanar. Holy grail of statistical mechanics for 75 years before proved NP-hard. Establishing NP-completeness means that physicists won't spend another 75 years attempting to solve the unsolvable. 

Nash equilibria. Cooperative game theory. Given a 2-player game, find a Nash equilibrium that maximizes the payoff to player 1. Do more than one NE exist? Is there a NE that is Pareto optimal? NE that maximizes social welfare.