Penrose’s triangle

Introduction

The Penrose’s triangle below is the basis of some of Escher prints highlighting illusions about the prospects (see the waterfall and gazebo).

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C to HTML converter

Introduction

Here is a little tool which permits to beautify the C source file for the Web publishing (I worked from a Tom St Denis release).
C2HTML is a tool running in a command line mode which converts the ‘infile.c’ C source file into ‘outfile.c.html’ HTML source file. (Lire la suite…)

Continued fractions

Introduction

The decomposition in continued fractions provides an approximation of a real by a series of fractions more and more precise. (Lire la suite…)

Klein’s surface

Introduction

The Klein’s surface is a symetrical alternative of the legacy Klein’s bottle, by increasing its diameter up to the infinite and by localization of its special perturbation. (Lire la suite…)

This site is referred by the Educasource base of Teaching Documentation National Center, France

The music scale – a little theory

Summary

In the literature concerning the music theory, the division of the octave in 12 intervals is often presented as a cultural receipt which was refined during centuries.
However this division in 12 semitones or the value retained for the ‘comma’ can be synthesized easily by a simple calculation… (Lire la suite…)