The conflict between Soviet Communists and Boris Pasternak over the publication of Doctor Zhivago did not end when he won the Nobel Prize, or even when the author died. Paolo Mancosu tells how Pasternak's expulsion from the Soviet Writers' Union left him in financial difficulty. After Pasternak's death, Olga Ivinskaya, his companion, literary assistant, and the inspiration for Zhivago's Lara, also received some of the Zhivago royalties. After the KGB intercepted Pasternak's will on her behalf, the Soviets arrested and sentenced her to eight years of labor camp. The ensuing international outrage inspired a secret campaign in the West to win her freedom. Mancosu's new book--the first to explore the post-Nobel history of Pasternak and Ivinskaya--provides extraordinary detail on these events, in a thrilling account that involves KGB interceptions, fabricated documents, smugglers, and much more. While a general reader will respond to the dramatic human story, specialists will be rewarded with a rich assemblage of new archival material, especially letters of Pasternak and Ivinskaya from the Feltrinelli Archives and the Hoover Institution Library and Archives.

An Introduction to Proof Theory provides an accessible introduction to the theory of proofs, with details of proofs worked out and examples and exercises to aid the reader's understanding. It also serves as a companion to reading the original pathbreaking articles by Gerhard Gentzen. The first half covers topics in structural proof theory, including the Gödel-Gentzen translation of classical into intuitionistic logic (and arithmetic), natural deduction and the normalization theorems (for both NJ and NK), the sequent calculus, including cut-elimination and mid-sequent theorems, and various applications of these results. The second half examines ordinal proof theory, specifically Gentzen's consistency proof for first-order Peano Arithmetic. The theory of ordinal notations and other elements of ordinal theory are developed from scratch, and no knowledge of set theory is presumed. The proof methods needed to establish proof-theoretic results, especially proof by induction, are introduced in stages throughout the text. Mancosu, Galvan, and Zach's introduction will provide a solid foundation for those looking to understand this central area of mathematical logic and the philosophy of mathematics.