deletions | additions       diff --git a/Parallelization.tex b/Parallelization.tex  index 44ada09..73f2233 100644  --- a/Parallelization.tex  +++ b/Parallelization.tex 
...
memory with the objective of using processor caches more efficiently  in finite-difference operators. We have found that by using space  filling curves~\cite{Peano_1890}, as shown in Fig.~\ref{fig:gridmaps},  in particular the Hilbert curve~\cite{Hilbert_1891,Skilling2004} curve~\cite{Hilbert_1891,Skilling2004},  we can produce a significant improvement in the performance of semi-local operations. For example example,  in Fig.\ref{fig:gpu_laplacian} shows that a performance gain of around 50\% can be obtained for the finite-difference Laplacian operator running on a GPU. GPU by using a Hilbert urve to map the grid into memory.