Category Archives: Uncategorized

I’ve been working recently on trying to understand exactly how Wick rotation works in two-dimensional conformal field theory. There is an analog there of some of the issues with Wick rotation of spinors and twistors in four dimensions that I’ve … Continue reading →

Warning: if you follow this blog, you’ve heard this many times before, so can move on to something more interesting now. There’s a video conversation between Brian Greene and Lenny Susskind from last week here. At 44:02, Susskind has this … Continue reading →

There’s a new paper out on the Formalization of QFT, purporting to formalize a QFT using Lean/Mathlib. I’ve been trying to avoid spending time on the hot topics of AI and theorem proving, but in this case there’s a lot … Continue reading →

I’ve been trying to understand (not entirely successfully yet…) Wick rotation using hyperfunctions, which are a sort of distributions not as well-known as they should be. Some notes about them are in a separate pdf. What is well-known is that … Continue reading →

If one tries to Wick rotate a quantum field theory with spinor fields, it’s well-known that problems arise, something first recognized in Schwinger’s earliest papers on the subject. I’ll try and outline here the 1972 proposal by Osterwalder and Schrader … Continue reading →

This is related to the Osterwalder-Schrader posting, but is much, much more elementary. I’ll write up some basic facts about the quantum harmonic oscillator and explain what bothers me about the relation to Osterwalder-Schrader. Every quantum mechanics course covers the … Continue reading →

I’ve been trying to write up some new ideas about Wick rotation for a long time now, keep getting stuck as it becomes clear at various points that I haven’t gotten to the bottom of what is going on. To … Continue reading →

Like millions of people, I couldn’t stop myself from spending a fair amount of time recently doing searches here, where one can read endless emails, texts, etc. showing in detail what Jeffrey Epstein was up to over many years. I … Continue reading →

For now, a math item and a physics item, maybe more later… Four years ago, after the decision to have the 2026 ICM in the US was announced, I wrote: With the 2022 experience in mind, hopefully the IMU will … Continue reading →