9 Sep 2021Leen NoordzijLeave a Comment on Mijn geschiedenis van de haven van Pernis. 1942-1954, de haven, het water en de watersnood. Updated 2021-09-09, Aanvullingen, verbeteringen en foto toegevoegd. Mijn geschiedenis van de haven van Pernis. 1942-1954, de haven, het water en de watersnood. Updated 2021-09-09, Aanvullingen, verbeteringen en foto toegevoegd.
29 Aug 202129 Aug 2021Leen NoordzijLeave a Comment on Isoperimetric Inequality: a Proof by Fourier Expansion, and a proof with isosceles triangles Updated 2021-08-29. § 4 Edited Isoperimetric Inequality: a Proof by Fourier Expansion, and a proof with isosceles triangles Updated 2021-08-29. § 4 Edited
9 Aug 20219 Aug 2021Leen NoordzijLeave a Comment on Prime Numbers, Pythagorean Triples and Goldbach’s Conjecture Updated 2021-08-09 Edited, Prologue The Babylonians Prime Numbers, Pythagorean Triples and Goldbach’s Conjecture Updated 2021-08-09 Edited, Prologue The Babylonians
4 Jul 20214 Jul 2021Leen NoordzijLeave a Comment on De Fermat and the method of ‘Descente infinie’ Updated 2021-07-04 §§ 3.1 and 4. De Fermat and the method of ‘Descente infinie’ Updated 2021-07-04 §§ 3.1 and 4.
22 Jun 202122 Jun 2021Leen NoordzijLeave a Comment on Innovation, Education, Research and Reengineering Updated and Edited 2021-06-22 Conclusions pages 10, 11 and footnote Innovation, Education, Research and Reengineering Updated and Edited 2021-06-22 Conclusions pages 10, 11 and footnote
2 Apr 20212 Apr 2021Leen NoordzijLeave a Comment on A History of Shipping and Propulsion Edited and Updated 2021-04-02 Youtube video’s added. A History of Shipping and Propulsion Edited and Updated 2021-04-02 Youtube video’s added.
12 Feb 202112 Feb 2021Leen NoordzijLeave a Comment on 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 2021-02-12 Edited and Updated Aanvulling Intermezzo Baccalaureaat. 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 2021-02-12 Edited and Updated Aanvulling Intermezzo Baccalaureaat.
27 Apr 2020Leen NoordzijLeave a Comment on Puzzles with my grandchildren Updated 2020-04-27 Water-lilies growing in a pond Puzzles with my grandchildren Updated 2020-04-27 Water-lilies growing in a pond
24 Jul 201820 Sep 2018Leen NoordzijLeave a Comment on De scheepvaart en voortstuwing De scheepvaart en voortstuwing
12 Jun 201618 Sep 2018Leen NoordzijLeave a Comment on History or historical interpretation. History or historical interpretation.
