2,047 research outputs found
Linear ordinary differential equations: revisiting the impulsive response method using factorization
The complex crown for homogeneous harmonic spaces
A theory of holomorphic extension of eigenfunctions on homogeneous harmonic
spaces is developed.Comment: 17 pages, 1 figure
On the eigenfunctions of the Dirac operator on spheres and real hyperbolic spaces
The eigenfunctions of the Dirac operator on spheres and real hyperbolic
spaces of arbitrary dimension are computed by separating variables in geodesic
polar coordinates. These eigenfunctions are used to derive the heat kernel of
the iterated Dirac operator on these spaces. They are then studied as cross
sections of homogeneous vector bundles, and a group-theoretic derivation of the
spinor spherical functions and heat kernel is given based on Harish-Chandra's
formula for the radial part of the Casimir operator.Comment: 45 pages, latex, no figure
A Generalization of a Theorem of Mammana
We prove that any linear ordinary differential operator with complex-valued coefficients continuous in an interval I can be factored into a product of first-order operators globally defined on I. This generalizes a theorem of Mammana for the case of real-valued coefficient
Maximally Symmetric Spin-Two Bitensors on and
The transverse traceless spin-two tensor harmonics on and may be
denoted by . The index labels the (degenerate) eigenvalues
of the Laplacian and the other indices. We compute the bitensor
where are distinct
points on a sphere or hyperboloid of unit radius. These quantities may be used
to find the correlation function of a stochastic background of gravitational
waves in spatially open or closed Friedman-Robertson-Walker cosmologies.Comment: 12 pages, RevTeX, uuencoded compressed .tex file, minor typos
correcte
Contributo al femminile allâeducazione tecnica e scientifica per le materie STEM. Fare rete tra scienziate/i, enti, universitĂ , associazioni, media e portatori dâinteresse
Questo âcontributo al femminileâ Ăš stato realizzato da un gruppo di perso-
ne che ambisce a contribuire al miglioramento dellâeducazione scolastica; Ăš
destinato a donne, uomini, ragazze, ragazzi, bambine e bambini per mettere in
luce potenzialitĂ , diseguaglianze, specificitĂ di vita e professionali e favorire la
paritĂ di genere soprattutto negli ambiti tecnico-scientifici, in particolar modo
nelle discipline STEM (Science, Technology, Engineering, Mathematics)
Energy Resolution Performance of the CMS Electromagnetic Calorimeter
The energy resolution performance of the CMS lead tungstate crystal electromagnetic calorimeter is presented. Measurements were made with an electron beam using a fully equipped supermodule of the calorimeter barrel. Results are given both for electrons incident on the centre of crystals and for electrons distributed uniformly over the calorimeter surface. The electron energy is reconstructed in matrices of 3 times 3 or 5 times 5 crystals centred on the crystal containing the maximum energy. Corrections for variations in the shower containment are applied in the case of uniform incidence. The resolution measured is consistent with the design goals
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