Gertrude stein was an author, close friend, and even supporter of picasso, and was integral to his growth as an artist.
The aesthetic theory that picasso's portrait of gertrude stein adheres to is formalism. Thank you for posting your question. 12 *robert delaunay, champs de mars, or the red tower, 1911. 'portrait of gertrude stein' was created in 1906 by pablo picasso in expressionism style.