1. Seeing the sun has an immediate improvement on mood. Baltimore is kind of pretty when its not covered in 12 foot mountains of dirty snow.
2. In particular, the identity matrix serves as the unit of the ring of all n-by-n matrices, and as the identity element of the general linear group GL(n) consisting of all invertible n-by-n matrices. (The identity matrix itself is invertible, being its own inverse.)
I have no idea what that means but apparently I should. Thats going to be one of those things that I cross my fingers and hope doesnt show up on the exam. In the meantime, I will amuse myself with Poisson regressions and Cox proportional hazards. I might not really know what those are either, but at least I understand the words.
3. Some people have not read Cappyboppy by Bill Peet. That is a travesty. But this lady obviously did...
http://www.peoplepets.com/photos/strange/life-with-the-world-s-largest-rodent/1
4. And finally, when all else fails, pour yourself some wine, eat a chocolate chip cookie, and count the days until Spring Break. I believe the number is 10.
