Leen Noordzij – Page 4 – This blog is about, business, climate change, culture, economics, physics, education, Fermat, history, innovation, mathematics, politics, quantum mechanics and technology.

When everybody is going in one direction, choose another one.

Groupthink is the end of humanity.

16 Aug 202116 Aug 2021Leen NoordzijLeave a Comment

Quantum Mechanics and the Theoretical Minimum Updated 2021-08-16 Section 4.8 Ignoring the Phase Factor in Exercise 3.4 and the matrix σn some phase factors could not be ignored.

6 Jul 20216 Jul 2021Leen NoordzijLeave a Comment

Raindrops keep falling on my umbrella. Or how to survive as an umbrella manufacturer. Edited and Updated 2021-07-06.

4 Jul 20214 Jul 2021Leen NoordzijLeave a Comment

De Fermat and the method of ‘Descente infinie’ Updated 2021-07-04 §§ 3.1 and 4.

27 Jun 202127 Jun 2021Leen NoordzijLeave a Comment

Quantum Mechanics in Texas, The Graduate Course Updated 2021-06-27 Section 5.4 Intermezzo Baker-Hausdorff Lemma

20 Jun 202120 Jun 2021Leen NoordzijLeave a Comment

Abolish 2.1. Every governmental institution develops into incompetence. Updated 2021-06-20, Conclusions and Epilogue.

10 Jun 202110 Jun 2021Leen NoordzijLeave a Comment

Archimedes’ Lever, Trisectrice of an angle by Geometrical Iteration Updated 2021-06-10, Edited and § 6.11: direct geometrical iteration of β/3 for 2π/3<β<2π

10 Jun 202110 Jun 2021Leen NoordzijLeave a Comment

The Theoretical Minimum to Study Classical Physics Updated 2021-06-10 Edited, A.2.3 Mathematical Proof of Kepler’s Swiped Area Law, page 55 of my notes

29 Apr 202129 Apr 2021Leen NoordzijLeave a Comment

Quantum Mechanics found in a nutshell. Updated 2021-04-29 I leave the Mahan Course

26 Feb 202126 Feb 2021Leen NoordzijLeave a Comment

On Special relativity and Classical Field Theory The theoretical minimum Updated 2021-02-26, Edited Up to Exercise 6.2, page 241

12 Sep 202012 Sep 2020Leen NoordzijLeave a Comment

Quantum Mechanics in Texas. The Undergraduate Course. Updated 2020-09-12 Sections 15.6-15.8

dr.l.noordzij@leennoordzij.nl