Back to the primordial Universe by a Monge–Ampère–Kantorovich optimization scheme R. Mohayaee, U. Frisch, S. Matarrese and A. Sobolevskiĭ A&A, 406 2 (2003) 393-401 Published online: 17 November 2003 DOI: 10.1051/0004-6361:20030719