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Öğe Analyzes of algebraic classification of higher dimensional Kundt geometries with large D method(Tubitak Scientific & Technological Research Council Turkey, 2023) Kirezli, PinarIn this paper, the classification of higher dimensional Kundt geometry is revisited as the dimension of the spacetime D -> infinity. In addition to previous studies, in order to Kundt geometry becomes algebraically special spacetime obligatory conditions are determined. Additionally, Type II, Type III, Type N, Type O, and Type D Kundt geometries are explicitly analyzed. Classification of several metrics such as pp-waves, nongyratonic Kundt metric, and VSI spacetime, which are well-known subclasses of Kundt geometry are studied.Öğe Static, cylindrically symmetric spacetime in the coincident f(Q) gravity(Iop Publishing Ltd, 2024) Kirezli, Pinar; Ozceylan, NilhanIn this paper we consider a static, cylindrically symmetric spacetime with coincident f(Q) gravity. Since the field equation of this spacetime in symmetric teleparallel gravity is suitable for choosing the function of f(Q) in the form of power series and exponential forms which are in coherent with cosmological observations, anisotropic perfect fluid solutions of these forms are discussed for this spacetime. Energy densities, directional pressures and energy conditions are plotted and analysed for a few different metric potentials. Although corresponding cosmic strings violate all energy conditions in both f(Q) functions, the corresponding Levi-Civita solution violates all energy conditions in the power law function of f(Q), but for exponential f(Q) gravity they are satisfied in small regions.