A Lattice Spanning-Tree Entropy Function

ML Glasser, George Lamb

The function $$W(aq,b)=\int {\int }_0^{2\pi }\ln [1-a\cos x-b\cos y-(1-a-b)\cos (x+y)]dxdy$$ which expresses the spanning-tree entropy for various two dimensional lattices, for example, is…