I’m often surprised, though I shouldn’t be given how broad and deep the canon is, that pieces of that story are missing from a blog that covers 1,500 plus artists (this btw for those who are new). Leon Polk Smith was an American painter. His geometrically oriented abstractpaintings were influenced by Piet Mondrian and he is a follower of the Hard-edge school. His best-known paintings constitute maximally reduced forms, characterized by just two colors on a canvas meeting in a sharply delineated edge.
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Painting After Art is Dead 