The optimism is great, the phones are ringing, reservations are flowing in. The word is definitely out that it's going to be a good season. Anytime there's a good ski season that naturally spills over into summer. It's that liquid gold, the snow.

There are two things that you need to save for. First, you need an emergency cushion of no fewer than six months of living expenses. This needs to be cash in a liquid account where you can get at it in - yes - an emergency if you need it. In other words, money markets, not CDs. You also need to save for your future: that means retirement.

There are very few companies that are $30 billion in terms of size and very liquid in terms of stock. You have the top line growing in the mid-teens and earnings growing in excess of 25 percent. That's very difficult to find.

I hope that seeing the excitement of solving this problem will make young mathematicians realize that there are lots and lots of other problems in mathematics which are going to be just as challenging in the future.

The mistakes and unresolved difficulties of the past in mathematics have always been the opportunities of its future.