On a Weyl‐type theorem for higher‐order Lagrangians

1987 ◽  
Vol 28 (8) ◽  
pp. 1854-1857
Author(s):  
M. Castagnino ◽  
G. Domenech ◽  
R. J. Noriega ◽  
C. G. Schifini
Keyword(s):  
2005 ◽  
Vol 71 (1) ◽  
pp. 17-28
Author(s):  
L. Bernal-González ◽  
A. Bonilla ◽  
M. C. Calderón-Moreno

We prove a Seidel-Walsh-type theorem about the universality of a sequence of derivation-composition operators generated by automorphisms of the unit disk in the setting of the higher order Hardy spaces. Moreover, some related positive or negative assertions involving interpolating sequences and sequences between two tangent circles are established for the class of bounded functions in the unit disk. Our statements improve earlier ones due to Herzog and to the first and third authors.


2019 ◽  
Vol 183 ◽  
pp. 284-302 ◽  
Author(s):  
Wei Dai ◽  
Guolin Qin ◽  
Yang Zhang

10.37236/1987 ◽  
2005 ◽  
Vol 12 (1) ◽  
Author(s):  
Karen Meagher ◽  
Lucia Moura ◽  
Brett Stevens

A Sperner partition system is a system of set partitions such that any two set partitions $P$ and $Q$ in the system have the property that for all classes $A$ of $P$ and all classes $B$ of $Q$, $A \not\subseteq B$ and $B \not\subseteq A$. A $k$-partition is a set partition with $k$ classes and a $k$-partition is said to be uniform if every class has the same cardinality $c=n/k$. In this paper, we prove a higher order generalization of Sperner's Theorem. In particular, we show that if $k$ divides $n$ the largest Sperner $k$-partition system on an $n$-set has cardinality ${n-1 \choose n/k-1}$ and is a uniform partition system. We give a bound on the cardinality of a Sperner $k$-partition system of an $n$-set for any $k$ and $n$.


2014 ◽  
Vol 34 (9) ◽  
pp. 3317-3339 ◽  
Author(s):  
Frank Arthur ◽  
◽  
Xiaodong Yan ◽  
Mingfeng Zhao

2021 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
Kui Li ◽  
Zhitao Zhang

<p style='text-indent:20px;'>In this paper, we study higher-order Hardy-Hénon elliptic systems with weights. We first prove a new theorem on regularities of the positive solutions at the origin, then study equivalence between the higher-order Hardy-Hénon elliptic system and a proper integral system, and we obtain a new and interesting Liouville-type theorem by methods of moving planes and moving spheres for integral system. We also use this Liouville-type theorem to prove the Hénon-Lane-Emden conjecture for polyharmonic system under some conditions.</p>


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