Leen Noordzij – 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.

17 May 202217 May 2022Leen NoordzijLeave a Comment

Mijn geschiedenis van de haven van Pernis. 1942-1954, de haven, het water en de watersnood. Updated 2022-05-17, Foto’s toegevoegd, o.a. van de lagere school.

16 May 202216 May 2022Leen NoordzijLeave a Comment

Quantum Mechanics in Pennsylvania-Undergraduate Course Updated 2022-05-16 Chapter 8, Schrödinger Wave Equation, 1-D Quantum Systems, Problem 8.15.44 Uncertainty and Dynamics

8 May 20228 May 2022Leen NoordzijLeave a Comment

De beginjaren van de THT. An experiment with Liberal Arts at Twente Institute of Technology. Mijn studie en promotie aan de THT 1964-1973. Updated 2022-05-08

7 May 20227 May 2022Leen NoordzijLeave a Comment

Transformation, a Business Case. Updated 2022-05-07 Edited and additions, a.o. 8 Other Actors.

6 Apr 20226 Apr 2022Leen NoordzijLeave a Comment

Wiskunde D Online VWO 6 Summary Blok 15-16 Updated 2022-04-06 Blok 16 Les 4 Edited

23 Mar 202223 Mar 2022Leen NoordzijLeave a Comment

Wiskunde D Online VWO 4, Summary Blok 1-7 and solved Problems Mathematics Preparation for College, yOUlearn Updated Blok 7 2022-03-23 Les 2 Series Een klassieke meetkundige reeks: Achilles en de schildpad.

18 Mar 202218 Mar 2022Leen NoordzijLeave a Comment

Climate Change: From Fossil to Solar, Wind, Hydrogen and Nuclear Updated 2022-03-18 Edited and additions

5 Mar 20225 Mar 2022Leen NoordzijLeave a Comment

Wiskunde D Online VWO 5 Summary Blok 8-14 and Solved Problems Mathematics, Preparation for College, yOUlearn Blok 14 Dynamical Processes Toets Logistical growth, Updated 2022-03-05, Edited alle opgaven van de Toets en in addition to the course(toegift): a seperable Differential Equation explained(Note)

22 Feb 202222 Feb 2022Leen NoordzijLeave a Comment

De Fermat’s Last Theorem, Pythagorean Triples and The Descente Infinie revisited In Search for the Margin of Diophantus 2022-02-22 Edited and additions(§5.2), typos

29 Jan 2022Leen NoordzijLeave a Comment

Prime Numbers, Pythagorean Triples and Goldbach’s Conjecture Updated 2022-01-29 Edited, §5.2 Remark on Goldbach’s Conjecture

dr.l.noordzij@leennoordzij.nl