A View of Mathematics (2005) [pdf]
I am not a mathematician but I found that an interesting read. I am not sure how rigorous all this is, and even whether I understood the material completely. It just tickles the imagination. So here is my summary, in the hope it will tickle your imagination too. (If a mathematician can read it, please correct my layman mistakes)TLDR: after applying some special re-normalization to results from quantum field theory, coefficients of different models match and we can even get ratio of integers instead of bizarre numbers.It implies quantum field theory is not so special: we just don't understand some of its features, that seem to come from geometric symmetries.If I'm not too wrong, it also implies everything is discrete in the universe.