نتایج جستجو برای: generalized helgason

تعداد نتایج: 165872  

In this paper, a new inequality for generalized convex functions which is related to the left side of generalized Hermite-Hadamard type inequality is obtained. Some applications for some generalized special means are also given.

Journal: :Physical Review Letters 2023

We construct generalized symmetries for linearized Einstein gravity in arbitrary dimensions. First-principle considerations quantum field theory force to appear dual pairs. Verifying this prediction helps us find the full set of nontrivial conserved charges---associated, equal parts, with 2-form and ($D\ensuremath{-}2$)-form currents. Their total number is $D(D+1)$. compute commutators pairs ch...

2017
Yixing Huang Oliver Taubmann Xiaolin Huang Joachim Hornegger Guenter Lauritsch Andreas Maier

In limited angle tomography, only a limited angular range of data is acquired and consequently a double wedgeshaped region in the frequency domain representation of the imaged object is missing. Hence, streak artifacts occur. To restore the missing data, we perform a regression and an image fusion in sinogram domain and frequency domain, respectively. We first convert the sinogram restoration p...

In the present paper‎, ‎we propose an iterative algorithm for‎ ‎solving the generalized $(P,Q)$-reflexive solution of the quaternion matrix‎ ‎equation $overset{u}{underset{l=1}{sum}}A_{l}XB_{l}+overset{v} ‎{underset{s=1}{sum}}C_{s}widetilde{X}D_{s}=F$‎. ‎By this iterative algorithm‎, ‎the solvability of the problem can be determined automatically‎. ‎When the‎ ‎matrix equation is consistent over...

2003
P. L. BUTZER H. JOHNEN Ralph Phillips

Let f be a bounded function on the real line IF!. One may characterize the structural properties off by the modulus of smoothness w(t,f) = sup{lf (4 -f( y)l; x, y E 08, I x y I < t>, and, if w(t) is a continuous nondecreasing function of t > 0 such that w(O) = 0, by the Lipschitz class Lip(w) which is the set of all continuous functions such that su~~<~<i w(t, f)/o(t) < 00. It is possible to ex...

Journal: :SIAM J. Scientific Computing 2005
Annie A. M. Cuyt Gene H. Golub Peyman Milanfar Brigitte Verdonk

Abstract. In shape reconstruction, the celebrated Fourier slice theorem plays an essential role. It allows one to reconstruct the shape of a quite general object from the knowledge of its Radon transform [S. Helgason, The Radon Transform, Birkhäuser Boston, Boston, 1980]—in other words from the knowledge of projections of the object. In case the object is a polygon [G. H. Golub, P. Milanfar, an...

Journal: :Tatra Mountains Mathematical Publications 2019

Journal: :Proceedings of the American Mathematical Society 1960

Journal: :Journal of Physics: Conference Series 2021

Journal: :Journal of Physics A: Mathematical and Theoretical 2012

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