Fun with flexagons, and SVG

If you don't know Vihart and her "Hexaflexagon series", go check it out:


Seasonal plots, with gnuplot

Sometimes there is the need to plot some events which have a periodic trend.

Let's consider a seasonal phenomenon; a typical plot may not fully highlight the regularity of the periodic behavior:


JMP-rope, the theory and the software

The mathematical model behind the JMP-rope, as for any rotating POV system, is the polar coordinate system.



Inspired and adapted from a math joke:

Why do computer scientists always confuse Halloween and Christmas?
Because 31 Oct = 25 Dec.

Computer Scientists Halloween demotivational poster