Which of the following composers is NOT associated with the minimalist movement?

The choice of Gustav Mahler as the composer not associated with the minimalist movement is accurate, as he represents a different musical style that emerged predominantly in the late Romantic period. Mahler's works are known for their complex orchestration, dramatic emotional content, and expansive structures, which contrast sharply with the characteristics of minimalist music. Minimalism is defined by its use of repetitive patterns, simple harmonic structures, and a focus on steady pulsing rhythms, elements exemplified in the works of composers like Steve Reich, Philip Glass, and John Adams. These three composers are pioneers of minimalism, employing techniques such as phase shifting and the exploration of tonal harmony in innovative ways, which are foundational to the minimalist aesthetic. In contrast, Mahler's compositions are rich with intricate melodies and elaborate orchestral textures, positioning him firmly outside the minimalist tradition.