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AlbertJayNock

The State Of My Brain

On the debit  side:

I locked myself out of my office about half an hour ago and just got back in.

I brought the wrong notes to my database class today. The classroom is a long way from my office, so there was no time to go back to get the right ones.


On the credit side:

The other night over dinner, I started thinking about the number 1729 (as all math nerds occasionally do over dinner), and wondered how it could be demonstrated that it is a Carmichael number. I came up with a proof that (n1728-1)%1729 = 0 for n<1729. I then derived a general rule for determining if a number is a Carmichael number, and established that 561 was one too.

I did all this without pen and paper. And I haven't studied Carmichael numbers in a while.

In spite of not having any notes, I managed to give my database class a pretty good lecture on relational algebra, complete with examples.

Conclusion:

My brain doesn't do everything it is supposed to do for me. On the other hand the positive evidence can't be ignored, so I think dementia is still along ways off. Also, I have the flu so no part of me is firing on all cylinders. I think I'm OK.
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