Abstract
These research aims to analyse the compositional process used by the brazilian composer Willy Corrêa de Oliveira in Instantes e Prelúdios for solo piano, writed in 1977. These pieces are a important object of study by syntetize the compositional thought of Willy in his period from 1970 until 1980, which is caracterized by the use of radial polarizations idealized by the french theoric Edm…