{ "item_title" : "Refinement Calculus", "item_author" : [" Ralph-Johan Back", "Joakim Wright "], "item_description" : "Much current research in computer science is concerned with two questions: is a program correct? And how can we improve a correct program preserving correctness? This latter question is known as the refinement of programs and the purpose of this book is to consider these questions in a formal setting. In fact, correctness turns out to be a special case of refinement and so the focus is on refinement. Although a reasonable background knowledge is assumed from mathematics and CS, the book is a self-contained introduction suitable for graduate students and researchers coming to this subject for the first time. There are numerous exercises provided of varying degrees of challenge.", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/0/38/798/417/0387984178_b.jpg", "price_data" : { "retail_price" : "119.00", "online_price" : "119.00", "our_price" : "119.00", "club_price" : "119.00", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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