An Existence Problem for Matroidal Families

2016 ◽  
pp. 261-262
Author(s):  
José Manuel dos Santos Simões-Pereira
Keyword(s):  
Existence Problem

scholarly journals On the existence problem of the total domination vertex critical graphs

2011 ◽  
Vol 159 (1) ◽  
pp. 46-52 ◽  
Author(s):  
Moo Young Sohn ◽  
Dongseok Kim ◽  
Young Soo Kwon ◽  
Jaeun Lee
Keyword(s):  
Existence Problem ◽  
Total Domination ◽  
Critical Graphs

On the existence problem for localized acoustic waves on the interface between two piezocrystals

Wave Motion ◽  
1994 ◽  
Vol 20 (3) ◽  
pp. 233-244 ◽  
Author(s):  
V.I. Alshits ◽  
D.M. Barnett ◽  
A.N. Darinskii ◽  
J. Lothe
Keyword(s):  
Acoustic Waves ◽  
Existence Problem

Application of Multirate Filter Bank to the Co-Existence Problem of DS-CDMA and TDMA Systems

1996 ◽  
pp. 409-412
Author(s):  
Shinsuke Hara ◽  
Takahiro Matsuda ◽  
Norihiko Morinaga
Keyword(s):  
Filter Bank ◽  
Existence Problem

scholarly journals PERIODIC FIRST INTEGRALS FOR HAMILTONIAN SYSTEMS OF LIE TYPE

2011 ◽  
Vol 08 (06) ◽  
pp. 1169-1177 ◽  
Author(s):  
RUBEN FLORES ESPINOZA
Keyword(s):  
Hamiltonian Systems ◽  
Nonlinear Oscillator ◽  
Original System ◽  
First Integrals ◽  
Time Dependent ◽  
Existence Problem ◽  
Adjoint Group ◽  
Killing Form ◽  
Modern Physics ◽  
Existence Of Periodic Solutions

In this paper, we study the existence problem of periodic first integrals for periodic Hamiltonian systems of Lie type. From a natural ansatz for time-dependent first integrals, we refer their existence to the existence of periodic solutions for a periodic Euler equation on the Lie algebra associated to the original system. Under different criteria based on properties for the Killing form or on exponential properties for the adjoint group, we prove the existence of Poisson algebras of periodic first integrals for the class of Hamiltonian systems considered. We include an application for a nonlinear oscillator having relevance in some modern physics applications.

Sums of Squares Formulae With Integer Coefficients

1987 ◽  
Vol 30 (3) ◽  
pp. 318-324 ◽  
Author(s):  
Paul Y. H. Yiu
Keyword(s):  
Sums Of Squares ◽  
Existence Problem ◽  
Integer Coefficients

AbstractHidden behind a sums of squares formula are other such formulae not obtainable by restriction. This drastically simplifies the combinatorics involved in the existence problem of sums of squares formulae, and leads to a proof that the product of two sums of 16 squares cannot be rewritten as a sum of 28 squares, if only integer coefficients are permitted. We also construct all [10, 10, 16] formulae.

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