# Programming with large matrices

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```{attributiongrey} Attribution
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This chapter is written by Frans van der Meer. {ref}`Find out more here <programming_credit>`.
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This chapter contains a information that is aimed at improving your programming skills, in relation to dealing with setting up and solving large systems of equations. A selection of python tools is introduced that are relevant for PDE simulation methods, but that each have wider applicability. The central objective is computational efficiency. Sometimes a positive side-effect of using the right tools is improved readability of the code, although at other times readability needs to be sacrificed in favor of runtime.