Results 11 to 20 of about 982,446 (228)
, 2017 The aim of the present paper is to contribute to the development of the study of Cauchy problems involving Riemann-Liouville and Caputo fractional derivatives. Firstly existence-uniqueness results for solutions of non-linear Cauchy problems with vector fractional multi-order are addressed. A qualitative result about the behavior of local but non-global
Loïc Bourdin
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Duality theory for linear $n$-th order integro-differential operators with domain in $L^p_m$ determined by interface side conditions [PDF]
Czechoslovak Mathematical Journal, 1982 Otto Vejvoda +2 more
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Duality and a Riemann metrics in theory of a second order ODE’s
, 2017 A properties of integral curves of ODE’s of the second order d2 dx2 yx = Qx, y, y′ and of the first order d dxyx = Qnx,y Pnx,y with a help of conformal 4D- Riemann metrics of Fefferman and Walker types are investigated.
Driuma, V.S., Dryuma, V.
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Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein +7 more
wiley +1 more source
A Variational Beam Model for Failure of Cellular and Truss‐Based Architected Materials
Advanced Engineering Materials, EarlyView., 2023 Herein, a versatile and efficient beam modeling framework is developed to predict the nonlinear response and failure of cellular, truss‐based, and woven architected materials. It enables the exploration of their design space and the optimization of their mechanical behavior in the nonlinear regime. A variational formulation of a beam model is presented
Konstantinos Karapiperis +3 more
wiley +1 more source
Duality in Supersymmetric SU(N) Gauge Theory with a Symmetric Tensor [PDF]
Mod.Phys.Lett. A12 (1997) 1025-1034, 1997 Duality in supersymmetric SU(N) gauge theory with a symmetric tensor is studied using the technique of deconfining and Seiberg's duality. By construction the gauge group of the dual theory necessarily becomes a product group. In order to check the duality, several nontrivial consistency conditions are examined.
arxiv +1 more source
Duality covariant variables for STU-model in presence of non-holomorphic corrections [PDF]
JHEP 1009:036,2010, 2009 It is known that non-holomorphic corrections are necessary in order to get duality invariant free energy and entropy function. However the present methods of incorporating non-holomorphic corrections are in conflict with special geometry properties of moduli space.
arxiv +1 more source
Duality Rotations in Nonlinear Electrodynamics and in Extended Supergravity [PDF]
Riv.Nuovo Cim.31:625-708,2008, 2008 We review the general theory of duality rotations which, in four dimensions, exchange electric with magnetic fields. Necessary and sufficient conditions in order for a theory to have duality symmetry are established. A nontrivial example is Born-Infeld theory with n abelian gauge fields and with Sp(2n,R) self-duality. We then review duality symmetry in
arxiv +1 more source
No U(1) 'electric-magnetic' duality in Einstein gravity [PDF]
arXiv, 2023 We revisit the question of whether classical general relativity obeys, beyond the linearised order, an analogue of the global U(1) electric-magnetic duality of Maxwell theory, with the Riemann tensor playing the role analogous to the field strength. Following contradictory claims in the literature, we present a simple gauge-invariant argument that the ...
arxiv