Final answer:
Arnold Schoenberg is a parallel to Coleman in terms of their experimental approach to music.
Step-by-step explanation:
Coleman's indeterminacy as a composer makes him a parallel to Arnold Schoenberg in terms of their experimental approach to music. Schoenberg, an Austrian composer, is known for his innovations in atonality and his invention of the twelve-tone scale.
He deliberately subverted the traditional expectations of western music by incorporating dissonance and unexpected notes in his works. Similarly, Coleman's indeterminacy as a composer challenges established musical norms, allowing for improvisation and a departure from traditional compositional techniques.