{"product_id":"5060211500961","title":"Helluva Band","description":"V.N. Bukhartsev, M.R. Petrichenko, Ekstremal'nye zadachi dlya fil'tratsionnykh potokov. Traditsionnye zadachi gidravlicheskoy teorii fil'tratsii (ob opredelenii svobodnoy poverkhnosti fil'tratsionnogo potoka, vychislenie vysoty promezhutka vysachivaniya) izuchayutsya v variatsionnoy postanovke. Dokazyvaetsya vozmozhnost' pogruzheniya traektoriy uravneniy fil'tratsii v pole ekstremaley proizvodyashchikh funktsionalov. Eta protsedura pozvolyaet, vo-pervykh, oslabit' topologiyu zadachi do , vo-vtorykh, rasshirit' oblast' opredeleniya uravneniy teorii fil'tratsii do neravnomernykh dvizheniy, nayti predstavlenie dlya gomeomorfizma potoka i vvesti mery otkloneniya deystvitel'nykh dvizheniy ot ravnomernykh. Nakonets, proizvodyashchie funktsionaly (deystviya) vybirayutsya ne iz arsenala mekhaniki (printsipy Gamil'tona, Lezhen-Dirikhle, naimen'shego prinuzhdeniya i t.p.), no stroyatsya yavno, iskhodya iz fenomenologicheskikh uravneniy gidravlicheskoy teorii, s pomoshch'yu prostykh protsedur. Rabota prednaznachena, glavnym obrazom, dlya spetsialistov v oblasti prikladnoy matematiki i mekhaniki, soprikasayushchikhsya s zadachami gidravliki.","brand":"Potomac Inst for Policy Studies","offers":[{"title":"Default Title","offer_id":47093066170608,"sku":"5060211500961","price":20.49,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/5060211500961_p0.jpg?v=1763605657","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/5060211500961","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}