{"title":"多个复变数中的随机多项式","authors":"Turgay Bayraktar, Thomas Bloom, Norm Levenberg","doi":"10.1007/s11854-023-0316-x","DOIUrl":null,"url":null,"abstract":"<p>We generalize some previous results on random polynomials in several complex variables. A standard setting is to consider random polynomials <span>\\({H_n}(z): = \\sum\\nolimits_{j = 1}^{{m_n}} {{a_j}{p_j}} \\)</span> that are linear combinations of basis polynomials {<i>p</i><sub><i>j</i></sub>} with i.i.d. complex random variable coefficients {<i>a</i><sub><i>j</i></sub>} where {<i>p</i><sub><i>j</i></sub>} form an orthonormal basis for a Bernstein-Markov measure on a compact set <span>\\(K \\subset {\\mathbb{C}^d}\\)</span>. Here <i>m</i><sub><i>n</i></sub> is the dimension of <span>\\({{\\cal P}_n}\\)</span>, the holomorphic polynomials of degree at most <i>n</i> in <span>\\({\\mathbb{C}^d}\\)</span>. We consider more general bases {<i>p</i><sub><i>j</i></sub>}, which include, e.g., higher-dimensional generalizations of Fekete polynomials. Moreover we allow <span>\\({H_n}(z): = \\sum\\nolimits_{j = 1}^{{m_n}} {{a_{nj}}{p_{nj}}(z)} \\)</span>, i.e., we have an array of basis polynomials {<i>p</i><sub><i>j</i></sub>} and random coefficients {<i>a</i><sub><i>nj</i></sub>}. This always occurs in a weighted situation. We prove results on convergence in probability and on almost sure convergence of <span>\\({1 \\over n}\\log |{H_n}|\\)</span> in <span>\\(L_{{\\rm{loc}}}^1({\\mathbb{C}^d})\\)</span> to the (weighted) extremal plurisubharmonic function for <i>K</i>. We aim for weakest possible sufficient conditions on the random coefficients to guarantee convergence.</p>","PeriodicalId":502135,"journal":{"name":"Journal d'Analyse Mathématique","volume":"2 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Random polynomials in several complex variables\",\"authors\":\"Turgay Bayraktar, Thomas Bloom, Norm Levenberg\",\"doi\":\"10.1007/s11854-023-0316-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>We generalize some previous results on random polynomials in several complex variables. A standard setting is to consider random polynomials <span>\\\\({H_n}(z): = \\\\sum\\\\nolimits_{j = 1}^{{m_n}} {{a_j}{p_j}} \\\\)</span> that are linear combinations of basis polynomials {<i>p</i><sub><i>j</i></sub>} with i.i.d. complex random variable coefficients {<i>a</i><sub><i>j</i></sub>} where {<i>p</i><sub><i>j</i></sub>} form an orthonormal basis for a Bernstein-Markov measure on a compact set <span>\\\\(K \\\\subset {\\\\mathbb{C}^d}\\\\)</span>. Here <i>m</i><sub><i>n</i></sub> is the dimension of <span>\\\\({{\\\\cal P}_n}\\\\)</span>, the holomorphic polynomials of degree at most <i>n</i> in <span>\\\\({\\\\mathbb{C}^d}\\\\)</span>. We consider more general bases {<i>p</i><sub><i>j</i></sub>}, which include, e.g., higher-dimensional generalizations of Fekete polynomials. Moreover we allow <span>\\\\({H_n}(z): = \\\\sum\\\\nolimits_{j = 1}^{{m_n}} {{a_{nj}}{p_{nj}}(z)} \\\\)</span>, i.e., we have an array of basis polynomials {<i>p</i><sub><i>j</i></sub>} and random coefficients {<i>a</i><sub><i>nj</i></sub>}. This always occurs in a weighted situation. We prove results on convergence in probability and on almost sure convergence of <span>\\\\({1 \\\\over n}\\\\log |{H_n}|\\\\)</span> in <span>\\\\(L_{{\\\\rm{loc}}}^1({\\\\mathbb{C}^d})\\\\)</span> to the (weighted) extremal plurisubharmonic function for <i>K</i>. We aim for weakest possible sufficient conditions on the random coefficients to guarantee convergence.</p>\",\"PeriodicalId\":502135,\"journal\":{\"name\":\"Journal d'Analyse Mathématique\",\"volume\":\"2 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-12-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal d'Analyse Mathématique\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1007/s11854-023-0316-x\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal d'Analyse Mathématique","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1007/s11854-023-0316-x","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
We generalize some previous results on random polynomials in several complex variables. A standard setting is to consider random polynomials \({H_n}(z): = \sum\nolimits_{j = 1}^{{m_n}} {{a_j}{p_j}} \) that are linear combinations of basis polynomials {pj} with i.i.d. complex random variable coefficients {aj} where {pj} form an orthonormal basis for a Bernstein-Markov measure on a compact set \(K \subset {\mathbb{C}^d}\). Here mn is the dimension of \({{\cal P}_n}\), the holomorphic polynomials of degree at most n in \({\mathbb{C}^d}\). We consider more general bases {pj}, which include, e.g., higher-dimensional generalizations of Fekete polynomials. Moreover we allow \({H_n}(z): = \sum\nolimits_{j = 1}^{{m_n}} {{a_{nj}}{p_{nj}}(z)} \), i.e., we have an array of basis polynomials {pj} and random coefficients {anj}. This always occurs in a weighted situation. We prove results on convergence in probability and on almost sure convergence of \({1 \over n}\log |{H_n}|\) in \(L_{{\rm{loc}}}^1({\mathbb{C}^d})\) to the (weighted) extremal plurisubharmonic function for K. We aim for weakest possible sufficient conditions on the random coefficients to guarantee convergence.