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SYMMETRIES in PHYSICS

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Symmetry and Groups: Historical Aspects<br />

Symmetry <strong>in</strong> Physics: A Short History<br />

Group Theory: First Concepts<br />

Paper on Snow-Crystal Symmetry (N o 1 <strong>in</strong> History)<br />

In the w<strong>in</strong>ter of 1609 Kepler got caught by the snow-storm on<br />

one of the bridges <strong>in</strong> Prague<br />

In 1611 he published an article ’Strena seu de nive sexangula’<br />

exam<strong>in</strong><strong>in</strong>g the planar hexagonal symmetry 1<br />

Examples of Hexagonal Symmetry 2<br />

1 ’Strena seu de nive sexangula’ - ’On the Six-Cornered Snowflakes’;<br />

2 From Kenneth K. Librecht, Caltech<br />

Jerzy DUDEK<br />

<strong>SYMMETRIES</strong> <strong>in</strong> <strong>PHYSICS</strong>

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