We would like to invite you to submit research article in the 4th International Conference on Natural Sciences (ICNS2019)-Mathematics & Computer organized by Mathematics Department, University of Kurdistan, Iran. The theme for the ICNS2019 conference is to bring together innovative academics and industrial experts to a common forum. We would be delighted to have you present at this conference to hear what the experts and researchers have to share about the subjects. The subject will covers a broad range of applied mathematics and Computer sciences.