{"product_id":"8711801019079","title":"Johann Christoph Bach: Arie variate \u0026 Lamenti","description":"Issleduetsya razreshimost' zadachi Dirikhle s kvadratichno summiruemoy granichnoy funktsiey dlya obshchego lineynogo ellipticheskogo uravneniya vtorogo poryadka v ogranichennoy oblasti s gladkoy granitsey. Polucheny tochnye (po poryadku rosta) ogranicheniya na rost vblizi granitsy rassmatrivaemoy ogranichennoy oblasti mladshikh koeffitsientov uravneniya pri kotorykh reshenie (esli ono sushchestvuet) obladaet svoystvom (n-1)-mernoy nepreryvnosti, kharakterizuyushchim povedenie resheniya vblizi granitsy oblasti i opisyvayushchee v kakom smysle ono prinimaet svoe granichnoe znachenie. Polucheny neobkhodimye i dostatochnye usloviya sushchestvovaniya (n-1)-merno nepreryvnogo resheniya rassmatrivaemoy zadachi Dirikhle i ustanovleno, chto usloviya razreshimosti izuchaemoy zadachi imeyut vid, analogichnyy usloviyam razreshemosti v obychnoy obobshchennoy postanovke. Dokazano, v chastnosti, chto esli odnorodnaya zadacha (s ravnymi nulyu granichnoy funktsiey i pravoy chast'yu) ne imeet netrivial'nykh resheniy, to dlya vsekh kvadratichno summiruemykh granichnykh funktsiy i vsekh pravykh chastey iz sootvetstvuyushchikh funktsional'nykh prostranstv sushchestvuet (n-1)-merno nepreryvnoe reshenie neodnorodnoy zadachi.","brand":"David Huttner","offers":[{"title":"Default Title","offer_id":47093402042608,"sku":"8711801019079","price":18.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/8711801019079_p0.jpg?v=1763612989","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/8711801019079","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}