domain of attraction of normal law and zeros of random polynomials
نویسندگان
چکیده
let$ p_{n}(x)= sum_{i=0}^{n} a_{i}x^{i}$ be a random algebraicpolynomial, where $a_{0},a_{1}, cdots $ is a sequence of independent random variables belong to the domain of attraction of the normal law. thus $a_j$'s for $j=0,1cdots $ possesses the characteristic functions $exp {-frac{1}{2}t^{2}h_{j}(t)}$, where $h_j(t)$'s are complex slowlyvarying functions.under the assumption that there exist a real positive slowly varyingfunction $h(cdot)$ and positive constants $t_{0}$, $ c_{ast}$ and$c^{ast}$ that $c_{ast}h(t) leq mbox{re}[h_{j}(t)] leq c^{ast} h(t),;tleqt_{0},;j=1,cdots,n$, we find thatwhile the variance of coefficients are bounded, real zeros are concentrated around $pm 1$, and the expected number of realzeros of $p_n(x)$ round the origin at a distance $(log n)^(-s)$ of $pm 1$ are at most of order $oleft( (log n)^s log (log n)right)$.
منابع مشابه
Domain of attraction of normal law and zeros of random polynomials
Let$ P_{n}(x)= sum_{i=0}^{n} A_{i}x^{i}$ be a random algebraicpolynomial, where $A_{0},A_{1}, cdots $ is a sequence of independent random variables belong to the domain of attraction of the normal law. Thus $A_j$'s for $j=0,1cdots $ possesses the characteristic functions $exp {-frac{1}{2}t^{2}H_{j}(t)}$, where $H_j(t)$'s are complex slowlyvarying functions.Under the assumption that there exist ...
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چکیده ندارد.
15 صفحه اولfaculty of psychology and social sciences group of anthropology master thesis in major of anthropology
چکیده پایان نامه (شامل خلاصه، اهداف، روش های اجرا و نتایج به دست آمده): کار جمع آوری گو یش های محلی در سال های اخیر شتاب امیدوار کننده ای به خود گرفته است. شاید از بارزترین اهداف جمع آوری گویش های مختلف، ثبت و ضبط آن، جلوگیری از نابودی و مهمتر از همه حل مشکلات دستوری زبان رسمی باشد. دقت در فرآیند های زبانی گویش های محلی نوع ارتباط مردم نواحی مختلف با پیرامون نشان را به ما نشان خواهد داد. از س...
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عنوان ژورنال:
bulletin of the iranian mathematical societyجلد ۴۱، شماره ۴، صفحات ۱۰۱۹-۱۰۳۰
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