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| | ipedia.com: Musical set theory Article (Site not responding. Last check: 2007-11-05) |
 | | The domain of all pitch class sets may be partitioned into types or equivalence classes based on cardinality or number of pitch classes, or other criteria. |
 | | There are thirteen cardinalities from 0-12: the null set, monad, dyad, trichord, tetrachord, pentachord, hexachord, septachord, octachord, nonachord, decachord, undecachord, and aggregate or dodecachord. |
 | | The basic operations that may be performed on a set are transposition and inversion and multiplication. |
| www.ipedia.com /musical_set_theory.html (1375 words) |
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