Top all-time · #13153
Jakob Schwichtenberg
Personal blog · jakobschwichtenberg.comsciencephilosophy
Jakob Schwichtenberg's personal blog at jakobschwichtenberg.com covers science and philosophy. Since 2020, 6 different Hacker News readers have linked it 7 times, most often “A Mystery called Wick Rotation or can we understand the “Action” Formalism?”. It is still writing: the last post was on 2026-06-01, and you can follow it by feed.
Too few sampled comments (3) to say how often HN recommends it.?
Why HN links it
HN readers link Jakob Schwichtenberg's blog for physics posts, such as on Wick rotation and the action formalism, and point to it alongside his classical mechanics book.
Summarised by Claude from a sample of 3 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Physicist and author of Physics from Symmetry and the No-Nonsense Books.
Most-linked posts?
- A Mystery called Wick Rotation or can we understand the “Action” Formalism?2 people · 2 mentions · first linked 2020-07-01
What Hacker News says?
He has a pretty good blog you can check out http://jakobschwichtenberg.com/ But honestly the book is very cheap relative to how good it is IMO
Comment linking /
on “Structure and Interpretation of Classical Mechanics”Submitted Why experts are bad teachers and who you should learn from instead as a story · 2 points
HN discussionWith complex numbers in polar form the tangent is easy. In the unitary circle, if you derive e^(i*t) you get i*e^(i*t), which maps the cos(t) real component to i*cos(t) imaginary, and the i*sin(t) imaginary component to -sin(t) real. This is effectively a 90 degree rotation, so if you integrate the tangent infinitesimally over its path parameterized by t you will recover the circle. Here is some introductory materia…
Comment linking /naive-introduction-lie-theory
on “How imaginary numbers were invented [video]”Submitted Book Review: Deschooling Society as a story · 2 points
HN discussionBaez always makes interesting reading. At the end of the abstract there is the arxiv-bait "inverse temperature is imaginary time", which relates to Wick Rotation and his work on quantropy a few years ago: http://jakobschwichtenberg.com/wick-rotation-action-formalis... https://johncarlosbaez.wordpress.com/2011/12/22/quantropy/ https://arxiv.org/abs/1311.0813 TL;DR if Boltzmann says thermodynamic states occur in propo…
Comment linking /wick-rotation-action-formalism/
on “Getting to the Bottom of Noether’s Theorem”Submitted Lie Group Theory – A Completely Naive Introduction as a story · 2 points
HN discussionSubmitted A Mystery called Wick Rotation or can we understand the “Action” Formalism? as a story · 2 points
HN discussion