Last time we did a lot of abstract nonsense. Today we are going to try and turn it into concrete nonsense.

Science and Math
Science and Math World

Last time we did a lot of abstract nonsense. Today we are going to try and turn it into concrete nonsense.

Once you start taking more higher level math classes, you start to realize that it’s all the same. If you’re a lazy thinker, that’s good news. It’s why I became a doctor of mathematics and not an actually useful medical doctor, because that’s too much work.

Representation theory is the only group theory there is – unless your groups are simple, and it’s useless.

When we make a cone of a diagram, we put the morphisms on the left. Dually, in a co-cone, the morphisms go on the… co-left.