Grupo Frente was a 1950s Brazilian art movement formed by artists who rejected the figuration and nationalism of the predominant modernist Brazilian painting style.
The movement was founded by the artist and teacher Ivan Serpa in Rio de Janeiro in 1954. Many of the artists associated with Grupo Frente were former pupils of Serpa at the Museum of Modern Art of Rio de Janeiro. Although the group was associated with concrete art, they were not characterised by any single stylistic position rather they were united in their rejection of modernist Brazilian painting. Some of the artists associated with the group, including Lygia Clark and Lygia Pape went on to form the hugely influential neo-concrete movement in 1958.
http://www.ftn-books.com has the Helio Oitica catalogue for the Joel Edelstein gallerynow available. Oitica was inspired by the artist from this group for this series of works.