Editing Derived row (section)

===Degree of symmetry===
{{See also|Set theory (music)#Symmetry}}

The second useful characteristic of a partition, the degree of symmetry (DS), "specifies the number of operations that preserve the unordered pcsets of a partition; it tells the extent to which that partition's pitch-class sets map into (or onto) each other under transposition or inversion."<ref name="Alegant 2001, p.5"/>