arXiv:1505.08034v1 [gr-qc] 29 May 2015 Cosmic Strings in Mimetic Gravity Davood Momeni 1 , ∗ Kairat Myrzakulov 1 , † Ratbay Myrzakulov 1 , ‡ and Muhammad Raza 2,3§ 1 Eurasian International Center for Theoretical Physics and Department of General & Theoretical Physics, Eurasian National University, Astana 010008, Kazakhstan 2 Department of Mathematics, COMSATS Institute of Information Technology, Sahiwal 57000, Pakistan and 3 State Key Lab of Modern Optical Instrumentation, Centre for Optical and Electromagnetic Research, Department of Optical Engineering, Zhejiang University, Hangzhou 310058, China (Dated: June 1, 2015) This paper is devoted to investigate cylindrical solutions in mimetic gravity. The explicit forms of the metric of this theory, namely mimetic-Kasner say is obtained. We have seen that the Kasner’s family of exact solutions needs to be reconsidered in this type of modified gravity. A no-go theorem is proposed for the exact solutions in the presence of a cosmological constant. PACS numbers: 04.50.Kd, 04.20.Cv, 04.20.Fy * momeni˙d@enu.kz, d.momeni@yahoo.com † myrzakulov˙kr@enu.kz ‡ rmyrzakulov@gmail.com § mraza@zju.edu.cn, mreza06@gmail.com