نتایج جستجو برای: conformal

تعداد نتایج: 22314  

A. Tayebiii E. Peyghani

Let  be an n-dimensional Riemannian manifold, and  be its tangent bundle with the lift metric. Then every infinitesimal fiber-preserving conformal transformation  induces an infinitesimal homothetic transformation on .  Furthermore,  the correspondence   gives a homomorphism of the Lie algebra of infinitesimal fiber-preserving conformal transformations on  onto the Lie algebra of infinitesimal ...

ژورنال: پژوهش های ریاضی 2021

      An important class of Finsler metric is named Kropina metrics which is defined by Riemannian metric α and 1-form β  which have many applications in physic, magnetic field and dynamic systems. In this paper, conformal transformations of χ-curvature and H-curvature of Kropina metrics are studied and the conditions that preserve this quantities are investigated. Also it is shown that in the ...

فرهنگ لران, , وحید کمالی, ,

We review the conformal symmetry group and investigate the isomorphism between the conformal group and O( D,2 ) . We study the classically  conformal invariant  scalar theory in D -dimensions with a non-positive potential . We solve the  equations  of motion  by  assigning O(D-1, 2)symmetry to the classical solutions with broken translational symmetry in all directions. Then we consider a six d...

Journal: :iranian journal of science and technology (sciences) 2008
b. bidabad

here, the concept of electric capacity on finsler spaces is introduced and the fundamentalconformal invariant property is proved, i.e. the capacity of a compact set on a connected non-compact finslermanifold is conformal invariant. this work enables mathematicians and theoretical physicists to become morefamiliar with the global finsler geometry and one of its new applications.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1389

چکیده ندارد.

سامان مقیمی عراقی, , شاهین روحانی, , مهدی سعادت, ,

  Logarithmic conformal field theory can be obtained using nilpotent weights. Using such scale transformations various properties of the theory were derived. The derivation of four point function needs a knowledge of singular vectors which is derived by including nilpotent variables into the Kac determinant. This leads to inhomogeneous hypergeometric functions. Finally we consider the theory ne...

Journal: :journal of paramedical sciences 0
sadegh sabzi radiology technology department, faculty of paramedical sciences,shahid beheshti university of medical sciences,tehran,iran mohsen bakhshandeh radiology technology department, faculty of paramedical sciences,shahid beheshti university of medical sciences,tehran,iran mohammad houshyari radiation oncology department, hospital shohada tajrish, tehran,iran nezhat shakeri department of biostatistics, faculty of paramedical sciences,shahid beheshti university of medical sciences,tehran,iran ali jabbary arfaee radiation oncology department, hospital shohada tajrish, tehran,iran

ionization radiation caused to incidence of complications in the exposed organs. in prostate radiotherapy, rectum and bladder have been radiated unwantedly and indicated some complications during and after treatment. the purpose of present study is to consider and to compare clinical complications of rectum and bladder in custom block and mlc for 3- d conformal radiotherapy, in order to determi...

Journal: :Physical review 2021

We study the conformal window of asymptotically free gauge theories containing ${N}_{f}$ flavors fermion matter transforming to vector and two-index representations $SO(N),SU(N)$ $Sp(2N)$ groups. For $SO(N)$ we also consider spinorial representation. determine critical number ${N}_{f}^{\mathrm{cr}}$, corresponding lower end window, by using conjectured condition on anomalous dimension bilinear ...

2008
M. Sharif Naghmana Tehseen

We study the consequences of timelike and spaccelike conformal Ricci and conformal matter collineations for anisotropic fluid in the context of General Relativity. Necessary and sufficient conditions are derived for a spacetime with anisotropic fluid to admit conformal Ricci and conformal matter collineations parallel to u and x. These conditions for timelike and spacelike conformal Ricci and c...

Journal: :iranian journal of science and technology (sciences) 2012
b. bidabad

using the electrostatic capacity of a condenser, the existence of a distance function on a finsler space is discussed. this distance function divides finsler spaces into the two classes, denoted here by i and ii. the topology generated by this distance on the finsler spaces of class ii coincides with its intrinsic topology. this work provides a natural extension of mathematical analysis tools n...

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