== A: An introduction == * Please describe yourself in three sentences, one of them regarding your current studies. I am Xie Rui in Tsinghua University, China. I am interested in the project "Improve iterative methods for sparse linear systems". I am hard-working and have a strong desire to finish my work completely. ** Which languages do you speak? I speak Chinese, Engilsh and a little German. ** What's your overall background? I major in both electrical engineering and mathematics. * Why do you want to participate in the Google Summer of Code? What do you hope to gain by doing so? Because I think it is a good opportunity to test my knowledge and ability of coding, gain a experience about a big project, and improve my skills. In addition, I think it is cool and helpful to contribute to an open source software like Octave, and the Google Summer of Code gives me this opportunity. ** Please also describe your previous experience with the GSoC, if any. I have no previous experience with the GSoC. * Why are you choosing Octave?