“ The new painters do not propose, any more than did their predecessors, to be geometers. But it may be said that geometry is to the plastic arts what grammar is to the art of a writer. Today, scientists no longer limit themselves to the three dimensions of Euclid. The painters have been led quite naturally, one might say by intuition, to preoccupy themselves with the new possibilities of spatial measurement which, in the language of modern studios are designated by the term: the fourth dimension.” – Guillaume Appolinaire, The Cubist Painters.
The painting is The Girl In A Pink Cap by Xesco, you can see more of his work here at his website.