Renormalization group: An interesting yet puzzling idea (Q2724964)

About today's topic, the meaning of the renormalization group, I have heard in the past any possible disagreement between physicists; in condensed matter and much more in field theory. It is or it is not fundamental. In spite of the empirical success of today's theories, which lead to Nobel prizes and all that, physicists are confused about the meaning of some aspects of these theories. More often than not, different physicists hold contradictory views on the actual meaning of the renormalization group. I would simply like to correct the impression that might have emerged from yesterday and today's discussion, that physicists know exactly what is going on in their theories, or that everybody agrees. And I want to tell physicists: if we are interested in knowledge, wouldn't it be more productive to fully display our confusion and our disagreements?NEWLINENEWLINEFor the entire collection see [Zbl 0964.00052].