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# Category: Mathematics

## Wiskunde D Online VWO 4 Summary Blok 1-7 and Solved Problems Mathematics, Preparation for College, yOUlearn Updated Blok 6 Les 4 Inner product, 2021-09-24, Edited, Aantal oefenopgaven opgenomen in de tekst

## The Isoepifaeic Inequality, Adaptation to Climate via Morphological Change. Updated 2021-09-23 and Edited and updated § 3.3 The Sphere and the Cone to be continued

## Quantum Mechanics in Pennsylvania Updated 2021-09-23 Chapter 7, Problem 7.5.6 Photons and Polarizers

## Isoperimetric Inequality: a Proof by Fourier Expansion, and a proof with isosceles triangles Updated 2021-08-29. § 4 Edited

## 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.

## Prime Numbers, Pythagorean Triples and Goldbach’s Conjecture Updated 2021-08-09 Edited, Prologue The Babylonians

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

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

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

## 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