Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Bruria Kaufman (August 21, 1918 January 7, 2010) was an Israeli theoretical physicist. She contributed to Albert Einstein's Theory of general relativity and to statistical physics. She is well-known for her studies of derivation using spinor analysis of the exact result of Lars Onsager on the partition function of the two-dimensional Ising Model. She collaborated with John von Neumann and Harry Lipkin on the Mössbauer effect.