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        <description>Représentation du potentiel de Lennard-Jones

L&#039;utilisation de fonctions en python permet de nombreuses applications par la création de graphiques. En utilisant la “bibliothèque matplotlib/pylab”, vous pourrez donc aisément créer des graphes de fonction.$V_{LJ} = 4\varepsilon \left[ \left(\frac{\sigma}{r}\right)^{12} - \left(\frac{\sigma}{r}\right)^{6} \right] = \varepsilon \left[ \left(\frac{r_{m}}{r}\right)^{12} - 2\left(\frac{r_{m}}{r}\right)^{6} \right]$$r_{m} = 2^{1/6} \sigma$$U_{tot} = \fr…</description>
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        <description>Pavage de Penrose

&lt;sxh python; title : pavage_penrose.py&gt;
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# réference :  &lt;http://preshing.com/20110831/penrose-tiling-explained&gt;
# version un peu aménagée du travail de EC et LP, ba2 chimie 2012-2013

import math
import cmath
import cairo

 # definir le nombre d&#039;or 
goldenRatio = (1 + math.sqrt(5)) / 2</description>
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