Results 31 to 40 of about 928,403 (288)

The 3-way flower intersection problem for Steiner triple systems [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2020
The flower at a point x in a Steiner triple system (X; B) is the set of all triples containing x. Denote by J3F(r) the set of all integers k such that there exists a collection of three STS(2r+1) mutually intersecting in the same set of k + r triples, r ...
H. Amjadi, N. Soltankhah
doaj   +1 more source

Comparative statistics and origin of triple and quadruple stars [PDF]

open access: yes, 2008
The statistics of catalogued quadruple stars consisting of two binaries (hierarchy 2+2) is studied in comparison with triple stars, with respective sample sizes of 81 and 724. Seven representative quadruple systems are discussed in greater detail.
A. Tokovinin   +46 more
core   +1 more source

On geometric structures associated with triple systems

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2012
In this paper, we show that geometric phenomena can be charac- terized using the concept of triple systems.
Kamiya Noriaki
doaj   +1 more source

Can planetary instability explain the Kepler dichotomy?

open access: yes, 2012
The planet candidates discovered by the Kepler mission provide a rich sample to constrain the architectures and relative inclinations of planetary systems within approximately 0.5 AU of their host stars.
Anders Johansen   +30 more
core   +1 more source

Stability of planets in triple star systems [PDF]

open access: yes, 2018
Context: Numerous theoretical studies of the stellar dynamics of triple systems have been carried out, but fewer purely empirical studies that have addressed planetary orbits within these systems.
Beust, H., Busetti, F., Harley, C.
core   +2 more sources

Triple Products and Yang-Baxter Equation (I): Octonionic and Quaternionic Triple Systems

open access: yes, 1992
We can recast the Yang-Baxter equation as a triple product equation. Assuming the triple product to satisfy some algebraic relations, we can find new solutions of the Yang-Baxter equation.
Kamiya N.   +5 more
core   +2 more sources

Perfect hexagon triple systems

open access: yesDiscrete Mathematics, 2004
This paper gives necessary and sufficient conditions (with only two exceptional cases which remain open) for the existence of perfect maximum packings of \(3kK_n\) with hexagon triples. Here a hexagon triple is a collection of three triples \(abc\), \(cde\), \(efa\) forming a hexagon.
Küçükçifçi, Selda, Lindner, C.C
openaire   +1 more source

Planetary nebulae that cannot be explained by binary systems

open access: yes, 2017
We examine the images of hundreds of planetary nebulae (PNe) and find that for about one in six PNe the morphology is too `messy' to be accounted for by models of stellar binary interaction.
Bear, Ealeal, Soker, Noam
core   +1 more source

Tidally Induced Oscillations and Orbital Decay in Compact Triple-Star Systems [PDF]

open access: yes, 2013
We investigate the nature of tidal effects in compact triple-star systems. The hierarchical structure of a triple system produces tidal forcing at high frequencies unobtainable in binary systems, allowing for the tidal excitation of high frequency p ...
Bedding, Timothy   +5 more
core   +5 more sources

Triple metamorphosis of twofold triple systems

open access: yesDiscrete Mathematics, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lindner, C. C., Meszka, M., Rosa, A.
openaire   +2 more sources

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