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In my research, I use DFT from time to time using SIESTA or VASP. I have spent much time reading up on the various aspects of DFT and think I have a pretty good handle on it. In order to prove this to myself, I would like to start to write my own code. I am however finding that it is difficult getting started. In particular, I don't really know where to begin. Is there anyone out there who has done this and can give me some insight on how they tackled this enormous undertaking.

Thanks in advance

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# Writing Electronic Structure Code

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