{"product_id":"9780486154930","title":"Calculus of Variations","description":"This concise text offers an introduction to the fundamentals and standard methods of the calculus of variations. In addition to surveys of problems with fixed and movable boundaries, its subjects include practical direct methods for solution of variational problems. Each chapter features numerous illustrative problems, with solutions. 1961 edition.","brand":"Dover Publications","offers":[{"title":"Default Title","offer_id":47112138883312,"sku":"9780486154930","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/233617796.jpg?v=1751657059","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9780486154930","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}