- H = - \sum_{(i,j)} J_{ij} S_i S_j - \mu B_0 \sum_i S_i \, \textrm{, mit}
-\]
-\[
-(i,j) = \textrm{n"achste Nachbarn im Gitter,} \qquad \vec{B} = (0,0,B_0)
+ H = - \sum_{(i,j)} J_{ij} S_i S_j - \mu B_0 \sum_i S_i \qquad (i,j) = \textrm{n"achste Nachbarn im Gitter,} \quad \vec{B} = (0,0,B_0)