Social Contracts and Compressed Sensing

Social Contracts: "Treat others as you would like to be treated," isn't so much a social contract as a moral guide.

Compressed Sensing: There is a veritable marching army of researchers doing compressed sensing. I've lost count of the number of introductory talks I've seen on the subject. I could probably give a talk on it myself. And everyone sketches the l₁ ball and mentions how pointy it is compared to the l₂ ball, which is not pointy at all. Today's talk was quite good, although by now, going to an introductory talk on compressed sensing is like wine-tasting. I know more or less how it's going to go, the question is how will the speaker deliver the key parts.