I received the following email:
I replied: Scarily enough, I don’t know anything about this research area at all!
My correspondent followed up:
Meh. They proved L1 approximates L0 when design matrix is basically full rank. Now all sparsity stuff is sometimes called ‘compressed sensing’. Most of it seems to be linear interpolation, rebranded.
I wrote back: But rebranding/reframing can be useful! Often reframing is a step in the direction of improvement, of better understanding one’s assumptions and goals.