Hyperscaling relation
= Hyperscaling relation
When the singular free energy in one correlation volume is of order one, $\alpha=2-d\nu$. Hyperscaling can fail above the upper critical dimension because of a dangerously irrelevant coupling.
= Hyperscaling relation
When the singular free energy in one correlation volume is of order one, $\alpha=2-d\nu$. Hyperscaling can fail above the upper critical dimension because of a dangerously irrelevant coupling.