|A1||X||Make quiz for Diana| |9:00||10:30||CS21A at F228| 1. The
Mathematics of the 3D Rotation Matrix : 17:20 The set of special
orthogonal matrices is a closed set. What does that mean, and
why do we care? A question like this is usually discussed only
in an upper-division set theory class, which is a class for
seniors majoring in math on the theoretical side. Not math for
engineering or science, but math for its own sake. By the time
you get to a set theory class, you have passed all the difficult
classes. Geometry, trigonometry, calculus and differential
equations are behind you. As Terry Pratchett might say, you have
gone through mathematics and come out the other side. In an
upper division set theory class, you will consider a math fact
such as "a set contains its elements". This fact will be given a
fancy name, like "The Baire Category Theorem", and you will be
asked to prove it. Since you are in the habit of following along
(or you wouldn't have made it all the way through mathematics
and out the othe