Canonical partition function 8 Spheres 8 Spherical pores Surface tension 8 Adopted measures 4 Common features 4 Different geometry 4 Distribution functions 4 Ellipsoidal cavity 4 Energy dependence 4 Extended systems 4 Few body systems 4 First-order dependence 4 Fluid potentials 4 Gaussian curvatures 4 Geometry 4 Graph representation 4 Hard cores 4 Hard spheres 4 Hard walls 4 Homogeneous regions 4 Intensive variables 4 Interacting particles 4 Interaction potentials 4 Laplace equation 4 Line tension 4 Low density 4 Many-body systems 4 Partition functions 4 Reversible work 4