[dvse]

All good advice - operator theory in various guises is ubiquitous in applications but certainly not something many discern even through grad school in CS.

Probably not much point trying to convince people on HN though - having perhaps suffered through an abysmal 'calculus' sequence they are not very receptive to the message that we have barely tapped practical consequences 50 year old mathematics.

You should perhaps do a stand alone blog - even on google plus!