{"product_id":"fourier-analysis-extremal-problems-von-sandor-krenedits","title":"Fourier analysis - extremal problems","description":"\u003cp\u003eIn this work the first chapter, titled \"Three-term idempotent counterexamples in the Hardy-Littlewood majorant problem\". First I veri_ed this counterexample for the three smallest cases (k = 0; 1; 2). In order to handle the calculation error, in the following three cases (k = 3; 4 and later even k = 5) I used more and more sophisticated processes and developed also an involved computer program to support the calculations. The second chapter is titled \"Maximization problems for positive de_nite functions supported in a given subset of a locally compact group\". Here I consider the extremal problem of maximizing a point value jf(z)j at a given point z in G by some positive definite and continuous function f on a locally compact group G, where z is in a given symmetric open set, and f vanishes outside this set, and is normalized by f(0) = 1.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9786202486606\"\u003e\u003ch3\u003e\u003c\/h3\u003e\u003c\/div\u003e","brand":"Libri","offers":[{"title":"Softcover - 9786202486606","offer_id":39465903259741,"sku":"9786202486606","price":49.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/0e618c32-5ef0-4088-8e02-b72726b10135.jpg?v=1757914222","url":"https:\/\/shop.autorenwelt.de\/en\/products\/fourier-analysis-extremal-problems-von-sandor-krenedits","provider":"Autorenwelt Shop","version":"1.0","type":"link"}