The extended singularity theorem states that these phenomena must be analyzed using an infinite system, which can be done using Wilson's renormalization group theory. Magnetic systems undergoing some types of these phenomena are subject to Widom scaling, and continuous ones that break no symmetries are called infinite-order. One theory of these phenomena expand the free energy in terms of a power 
The extended singularity theorem states that these phenomena must be analyzed using an infinite system, which can be done using Wilson's renormalization group theory. Magnetic systems undergoing some types of these phenomena are subject to Widom scaling, and continuous ones that break no symmetries are called infinite-order. One theory of these phenomena expand the free energy in terms of a power series of the (*) order parameter. The onset of superfluidity and the onset of paramagnetism are second-order ones, which are described by Landau's phenomenological theory, and first-order ones have latent heats. For 10 points, name these processes in which a system changes from one state to another, exemplified by freezing and boiling.
The extended singularity theorem states that these phenomena must be analyzed using an infinite system, which can be done using Wilson's renormalization group theory.
phase transitions [accept equivalents mentioning phases changing, prompt on things with the word "critical" in it]