Picabia/Duchamp/Stein

"Picabia had conceived and is struggling with the problem that a line should have the vibration of a musical sound and that this vibration should be the result of conceiving the human form and the human face in so tenuous a fashion that it would induce such vibration in the line forming it. It is his way of achieving the disembodied. It was this idea that conceived mathematically influenced Marcel Duchamp and produced his The Nude Descending the Staircase." (Stein, Gertrude. The Autobiography of Alice B Toklas, New York: Modern Library, 1993. 285.)




Duchamp's classic



Picabia. This Has to Do With Me, 1914. Not the best example, but the web offerings are a bit scarce.