This volume covers one of the most thrilling two-year periods in twentieth-century physics, as matrix mechanics- developed chiefly by W. Heisenberg, M. Born, and P. Jordan- and wave mechanics- developed by E. Schrödinger- supplanted the earlier quantum theory. The almost one hundred writings by Einstein, of which a third have never been published, and the more than thirteen hundred letters show Einstein's immense productivity and hectic pace of life. ukryj opis