# # Learn VASP

This is a page to record the learning log of VASP. The official website.

• https://www.vasp.at/wiki/index.php/Category:Tutorials
• https://www.vasp.at/tutorials/latest/molecules/part1/

## # The optimization of MAPbI3

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|                                                                             |
|           W    W    AA    RRRRR   N    N  II  N    N   GGGG   !!!           |
|           W    W   A  A   R    R  NN   N  II  NN   N  G    G  !!!           |
|           W    W  A    A  R    R  N N  N  II  N N  N  G       !!!           |
|           W WW W  AAAAAA  RRRRR   N  N N  II  N  N N  G  GGG   !            |
|           WW  WW  A    A  R   R   N   NN  II  N   NN  G    G                |
|           W    W  A    A  R    R  N    N  II  N    N   GGGG   !!!           |
|                                                                             |
|     The determination of the symmetry of your systems shows a strong        |
|     dependence on the tolerance parameter SYMPREC. This is often the        |
|     result of "noise" in the structural parameters (lattice vectors         |
|     and/or ionic positions). Set NWRITE=3 for more details.                 |
|                                                                             |
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