Beware of bugs in the above code; I have only proved it correct, not tried it.

Meta-design is much more difficult than design; it's easier to draw something than to explain how to draw it.

People think that computer science is the art of geniuses but the actual reality is the opposite, just many people doing things that build on each other, like a wall of mini stones.

...methods are more important than facts. The educational value of a problem given to a student depends mostly on how often the thought processes that are invoked to solve it will be helpful in later situations. It has little to do with how useful the answer to the problem may be. On the other hand, a good problem must also motivate the students; they should be interested in seeing the answer. Since students differ so greatly, I cannot expect everyone to like the problems that please me.

How can you own numbers? Numbers belong to the world.

Any inaccuracies in this index may be explained by the fact that it has been prepared with the help of a computer.

Premature optimization is the root of all evil.