{"product_id":"albert-einstein-kursunoglu-autograph-letter-unified-field-theory-123093","title":"Initialled autograph letter correcting a young colleague's work.","description":"\u003ch4 class=\"srb-faux-head\"\u003eeinstein letter\u003c\/h4\u003eInitialled autograph letter by Albert Einstein correcting the work of a graduate student who would become a prominent member of the theoretical physics community.\u003cbr\u003e\u003cbr\u003eTurkish physicist Behram Kurşunoğlu (1922-2003) studied in Edinburgh and completed his doctoral work at Cambridge under Paul Dirac during the late 1940s and early 1950s. He specialised in relativity and unified field theories, participated in the discovery of two neutrinos, and founded the Center for Theoretical Studies at the University of Miami.\u003cbr\u003e\u003cbr\u003eIn his initial letter to Einstein written on November 24th, 1950, Kurşunoğlu writes that he is 'enclosing you a note on the possibility of a slight modification of the unified field theory. I shall be very grateful, if you can kindly read it. I hope it is not inconsistent with the ideas of the theory. I apologise for disturbing you'.\u003cbr\u003e\u003cbr\u003eEinstein replies in detail on the verso of Kurşunoğlu's letter, returning it and the accompanying manuscript (no longer together with the letter) with a covering note by his secretary Helen Dukas. Einstein writes,\u003cbr\u003e\u003cbr\u003e'Equ (1) is not solved by (5) or (6). You have overlooked, that not \u003cu\u003eboth\u003c\/u\u003e equations yiky\u003csup\u003ehk\u003c\/sup\u003e=δil and yiky\u003csup\u003ekl\u003c\/sup\u003e=δy\u003csup\u003ee\u003c\/sup\u003e can hold. I have defined the contravariant y by the first of these equations - The non-existence of a practical solution for the T is no logical objection to the theory. The really problematic point of the theory lies in the compatibility of the equations for the T. E.'\u003cbr\u003e\u003cbr\u003eIn 1952 Kurşunoğlu published a paper in the \u003cem\u003ePhysical Review\u003c\/em\u003e, 'Gravitation and Electrodynamics', in which 'Einstein's unified field theory is modified, and some of the physical implications of the new theory are examined' (\u003cem\u003ePhysical Review\u003c\/em\u003e volume 88, number 1369, December 15th, 1952).\u003cbr\u003e\u003cbr\u003e\u003ci\u003eTen-line autograph letter with initial on cream laid paper (14 x 22.5 cm), on the verso of an autograph letter by Behram Kurşunoğlu, together with a typed letter signed by Helen Dukas on Institute for Advanced Study stationery (16.5 x 14 cm) and a later letter from Dukas dated 1979; a few tiny spots, excellent condition.\u003c\/i\u003e\u003cbr\u003e\u003cbr\u003e","brand":"EINSTEIN, Albert; KUR\u0026#350;UNO\u0026#286;LU, Behram.","offers":[{"title":"Default Title","offer_id":57631521538423,"sku":"123093","price":18500.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/4694\/1233\/files\/123093_01.jpg?v=1792616061","url":"https:\/\/shapero.com\/products\/albert-einstein-kursunoglu-autograph-letter-unified-field-theory-123093","provider":"Shapero Rare Books","version":"1.0","type":"link"}