Results 21 to 30 of about 301,015 (306)

Scientific Endeavors of A.M. Mathai: An Appraisal on the Occasion of his Eightieth Birthday, 28 April 2015

open access: yesAxioms, 2015
A.M. Mathai is Emeritus Professor of Mathematics and Statistics at McGill University, Canada. He is currently the Director of the Centre for Mathematical and Statistical Sciences India.
Hans J. Haubold, Arak M. Mathai
doaj   +1 more source

PING-PONG AND OUTER SPACE [PDF]

open access: yesJournal of Topology and Analysis, 2010
We prove that, if φ, ψ ∈ Out (FN) are hyperbolic iwips (irreducible with irreducible powers) such that 〈φ, ψ〉 ⊆ Out (FN) is not virtually cyclic, then some high powers of φ and ψ generate a free subgroup of rank two for which all nontrivial elements are again hyperbolic iwips.
Kapovich, Ilya, Lustig, Martin
openaire   +2 more sources

On the q-Laplace Transform and Related Special Functions

open access: yesAxioms, 2016
Motivated by statistical mechanics contexts, we study the properties of the q-Laplace transform, which is an extension of the well-known Laplace transform. In many circumstances, the kernel function to evaluate certain integral forms has been studied. In
Shanoja R. Naik, Hans J. Haubold
doaj   +1 more source

Entropy Optimization, Maxwell–Boltzmann, and Rayleigh Distributions

open access: yesEntropy, 2021
In physics, communication theory, engineering, statistics, and other areas, one of the methods of deriving distributions is the optimization of an appropriate measure of entropy under relevant constraints.
Nicy Sebastian   +2 more
doaj   +1 more source

RELATIVE TWISTING IN OUTER SPACE [PDF]

open access: yesJournal of Topology and Analysis, 2012
Subsurface projection is indispensable to studying the geometry of the mapping class group and the curve complex of a surface. When the subsurface is an annulus, this projection is sometimes called relative twisting. We give two alternate versions of relative twisting for the outer automorphism group of a free group.
Clay, Matt, Pettet, Alexandra
openaire   +2 more sources

Stability in Outer space

open access: yesGroups, Geometry, and Dynamics, 2018
We characterize strongly Morse quasi-geodesics in Outer space as quasi-geodesics which project to quasi-geodesics in the free factor graph. We define convex cocompact subgroups of Out (F_n) as subgroups such that an orbit map in the free factor ...
Ursula Hamenstädt, Sebastian Hensel
openaire   +2 more sources

Outer Space Exploration and the Sustainability of the Space Environment – An Uneasy Relationship

open access: yesPotchefstroom Electronic Law Journal, 2023
In contrast with the early years of space flight that were dominated by the political priorities and military concerns of the two superpowers, the USA and the then Soviet Union, a new space era has dawned where not only states are involved as serious ...
Anel Ferreira-Snyman
doaj   +1 more source

Arctic Security and Outer Space

open access: yesScandinavian Journal of Military Studies, 2020
Journalists often portray the Arctic and Space as rife with economic competition, contested territorial claims, and impending conflicts. In actuality, there is extensive and ongoing cooperation between Russia and Western states in both regions.
Michael Byers
doaj   +1 more source

The symmetries of outer space

open access: yesDuke Mathematical Journal, 2001
The authors investigate the natural map \(\text{Out}(F_n)\to\Aut(K_n)\) from the outer automorphism group of the free group of rank \(n\), \(F_n\), to the group of the spine, \(K_n\), of outer space and prove that for \(n\geq 3\), this natural map is an isomorphism.
Bridson, MR, Vogtmann, K
openaire   +4 more sources

Modelling the outer radiation belt as a complex system in a self-organised critical state [PDF]

open access: yes, 2005
The dynamic behaviour of the outer electron radiation belt makes this area of geo-space a candidate for the concept of self-organized criticality. It is shown here that frequency distributions of measured outer electron radiation belt data are well ...
Crosby, N. B.   +11 more
core   +1 more source

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