Before revision:  To the best of our knowledge, this is the first work that implements the SDD solver and IPM in the streaming model in \widetilde{O}(n) spaces for graph matrix. All the previous IPMs only focus on optimizing the running time, regardless of the space usage .
After revision:  To the best of our knowledge, this is the first work that implements the SDD solver and IPM in the streaming model in \widetilde{O}(n) spaces for graph matrices; previous IPM algorithms only focus on optimizing the running time, regardless of the space usage .