<P> The scientific theories and rules of color contrast that would guide composition for Divisionists placed the movement of Neo-Impressionism in contrast with Impressionism, which is characterized by the use of instinct and intuition . Scientists and artists whose theories of light or color had some impact on the development of Divisionism include Charles Henry, Charles Blanc, David Pierre Giottino Humbert de Superville, David Sutter, Michel Eugène Chevreul, Ogden Rood and Hermann von Helmholtz . </P> <P> Divisionism, along with the Neo-Impressionism movement as a whole, found its beginnings in Georges Seurat's masterpiece, A Sunday Afternoon on the Island of La Grande Jatte . Seurat was classically trained in the École des Beaux - Arts, and, as such, his initial works reflected the Barbizon style . Studying under Pierre Puvis de Chavannes, Seurat intensely pursued interests in line and color, color theory, and optical effects, all of which formed the basis of Divisionism . In 1883, Seurat and some of his colleagues began exploring ways to express as much light as possible on the canvas . By 1884, with the exhibition of his first major work, Bathing at Asnières, as well as croquetons of the island of La Grande Jatte, Seurat's style began taking form with an awareness of Impressionism, but it was not until he finished La Grande Jatte in 1886 that he established his theory of chromo - luminarism . Although this painting was originally rejected by the official salon it attracted the Salon des Indépendants where Paul Signac was engaged . </P> <P> Following the controversial success of La Grande Jatte, Camille Pissarro and Paul Signac converted to Neo-Impressionism and, along with Pissarro's son Lucien, formed the basis of the Neo-Impressionist and Divisionist movements . Later promoted by Symbolist artists and critics, Divisionism became the avant - garde style of post-Impressionism . The support Seurat initially received slowly dissipated as he became increasingly hostile towards other artists, believing that they were corrupting his style and technique . By the end of his life few works of his received the attention they used to . Circus, an unfinished work exhibited after his death, was barely noticed by critics or the general public . </P> <P> Camille Pissarro, born in 1830, is a notable radical artist and the only painter to exhibit in all eight Impressionist shows from 1874 to 1886 . During Pissarro's long career he remained at the foreground of French avant - garde art, although his Neo-Impressionist phase is among his most popular and most studied . Pissarro studied under Fritz Melbye, spending the first 15 years of his career painting rural landscapes, market scenes and ports all of which make subject returns throughout his later career . </P>

Is neo impressionism and post impressionism the same