A nonlocal transport equation describing roots of polynomials under differentiation
A nonlocal transport equation describing roots of polynomials under differentiation
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描述微分下多项式根的非局部传输方程
DOI:
10.1090/proc/14699
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发表时间:
2019
影响因子:
1
通讯作者:
Steinerberger, Stefan
中科院分区:
文献类型:
--
作者:
Steinerberger, Stefan
Letbe a polynomial of degreehaving all its roots on the real line distributed according to a smooth function. One could wonder how the distribution of roots behaves under iterated differentation of the function, ie, how the density of roots ofevolves. We derive a nonlinear transport equation with nonlocal flux\begin {equation*} u_t+\frac {1}{\pi}\left (\arctan {\left (\frac {Hu}{u}\right)}\right) _x= 0\qquad\text {on}~\operatorname {supp}\left\{u> 0\right\},\end {equation*} whereis the Hilbert transform. This equation has three very different compactly supported solutions:(1) the arcsine distribution,(2) the family of semicircle distributions\begin {equation*} u (t, x)=\frac {2}{\pi}\sqrt {(Tt)-x^ 2},\end {equation*} and (3) a family of solutions contained in the Marchenko–Pastur law. References
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影响因子:
1
作者:
S. Steinerberger
通讯作者:
S. Steinerberger
影响因子:
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作者:
G. Blower
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G. Blower
DOI:
--
发表时间:
2016
期刊:
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作者:
M. Kornyik;G. Michaletzky
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DOI:
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1998
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J. Elstrodt
DOI:
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1994
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H. Dette;W. J. Studden
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W. J. Studden