2022 November 27
$2 \! \times \! 2$ Matrix Eigenvector Formulas
A shortcut for finding the eigenvectors of a $2\times2$ matrix.
Eigenvector tool
2020 January 18
Tribonacci Constant Conjugate, $y=\frac{x-1}{x}$ and the Unit Circle
The tribonacci constant conjugate makes an appearance at the intersection of $y=\frac{x-1}{x}$ and the unit circle. Also a geometric construction by Xerardo Neira.
2020 January 15
Golden Ratio Conjugate, $y=x^2$ and the Unit Circle
Almost mildly interesting.
2019 December 17
Golden Diagonals and Fibonacci Numbers
Just an interesting coincidence between diagonals of golden rectangles and Fibonacci numbers.
2019 December 16
Polygons and Metallic Means
The golden mean is found in the pentagon. Silver mean in the octagon. But what about the other metallic means?
Visualization tool
2019 December 10
The Family of Metallic Means
by Vera W. de Spinadel
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