Revision as of 23:14, 19 July 2009 by Schubotz(talk | contribs)(Die Seite wurde neu angelegt: „ <math>U=\left\langle E \right\rangle =\frac{1}{Z\left( \beta ,N \right)}\sum\limits_{\alpha }{{{E}_{\alpha }}\exp \left( -\beta {{E}_{\alpha }} \right)}=-{{\part…“)