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# General info
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The time-dependent code `td-wslda` evolves wave-functions provided from outside. For test purposes, the solver can be initialized by uniform solution, in the same way as in the case of static solver `st-wslda`, for more info see [here](Initialization of the st wslda solvers).
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In practical applications solution generated by `st-wslda` codes is used as starting point for the evolution. Figure below shows relations between initial state generators and time revolvers.
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# Writing wave-functions to files
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In order to be able to use a solution generated by the `st-wslda` codes as input for `td-wslda` simulation user must store wave-functions in binary files. Following tags in _input_ file control :
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```bash
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# Tags from st-wslda input file
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outprefix strun # all output file with start with this prefix
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writewf 0 # write wf at the end of computation yes=1, no=0
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iogroups 8 # number of IO groups used for parallel wf writing, default=1
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# larges number TODO
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``` |
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\ No newline at end of file |
