10 citations · 15 across the 7 of their papers we have counts for
7 papers
Low-Frequency Scattering of TE and TM Waves by an Inhomogeneous Medium with Planar Symmetry
Farhang Loran, Ali Mostafazadeh, Cem Yetişmişoğlu
Stationary scattering of TE and TM waves propagating in an isotropic medium with planar symmetry is described by Bergmann's equation in one dimension. This is a generalization of H…
Drinfel'd Doubles, Twists and All That... in Stringy Geometry and M Theory
Aybike Çatal-Özer, Keremcan Doğan, Cem Yetişmişoğlu
Drinfel'd double of Lie bialgebroids plays an important role in T-duality of string theories. In the presence of and fluxes, Lie bialgebroids should be extended to proto Li…
Drinfel'd Double of Bialgebroids for String and M Theories: Dual Calculus Framework
Aybike Çatal-Özer, Keremcan Doğan, Cem Yetişmişoğlu
We extend the notion of Lie bialgebroids for more general bracket structures used in string and M theories. We formalize the notions of calculus and dual calculi on algebroids. We…
Discrete Dynamics and Supergeometry
Subhobrata Chatterjee, Andrew Waldron, Cem Yetişmişoğlu
We formulate a geometric measurement theory of dynamical classical systems possessing both continuous and discrete degrees of freedom. The approach is covariant with respect to cho…
The Variational Field Equations of Cosmological Topologically Massive Supergravity
Tekin Dereli, Cem Yetişmişoğlu
We discuss the formulation of cosmological topologically massive (simple) supergravity theory in three-dimensional Riemann-Cartan space-times. We use the language of exterior diffe…
Weyl Covariant Quadratic Curvature Gravity in 3-Dimensional Riemann-Cartan-Weyl Space-Times
Tekin Dereli, Cem Yetişmişoğlu
We discuss locally Weyl (scale) covariant generalisation of quadratic curvature gravity theory in three dimensions using Riemann-Cartan-Weyl space-times. We show that this procedur…
New Improved Massive Gravity and Three Dimensional Spacetimes of Constant Curvature and Constant Torsion
T. Dereli, C. Yetismisoglu
We derive the field equations for topologically massive gravity coupled with the most general quadratic curvature terms using the language of exterior differential forms and a firs…