per-member partition function satisfying the conditions of Yi [17] to include negative externalities. The solution gives …

We exhibit the partition function of the zero-dimensional λϕ4 model as a simple exact expression in terms of the … plane λ, for |argλ|<π. Consequently, the partition function understood as an analytic continuation is defined for all values …-vanishing imaginary part. We also evaluate the partition function on perturbative grounds, using the Borel summation technique and we …

one of its ends to the point where the potential changes. For this model, the exact partition function is available. In …

The distribution of the zeros of the partition function in the complex temperature plane (Fisher zeros) of the two …

presented for the critical line of the Potts model in an external field as determined from the zeros of the partition function …

in partition function form. Whether or not the core exists depends crucially on the expectations of each coalition …

canonical partition function, with no restrictions to the constant parameters of the model. We obtain corrections to known …

grand canonical partition function for self-interacting fermionic systems. As an application, we consider the anharmonic … knowledge of the exact expression for its grand canonical partition function enables us to check the β-expansion obtained using …