Did Picasso know about Einstein?

Was it a coincidence that Picasso developed Cubism at about the same time that Einstein published his theory of relativity? Arthur I Miller thinks not. read here
Einstein, Picasso: Space, time and the beauty that causes havoc
The most important scientist of the twentieth century – Albert Einstein – and its most important artist- Pablo Picasso – went through their period of greatest creativity almost simultaneously and in remarkably similar circumstances. This parallel biography of Einstein and Picasso as young men focuses on their greatest achievements: Einstein’s special theory of relativity and Picasso’s Les Demoiselles d’Avignon, the painting that brought art into the twentieth century. When they produced these astonishing breakthroughs, Einstein and Picasso were in their twenties, unknown, feisty, dirt-poor, and prone to getting into trouble. For a while, Picasso even carried the playwright Alfred Jarrey’s pistol – loaded with blanks – with which he would shoot people who struck him as overly dull or earnest.