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eisenforschung · Aug 30, 2024 · a64fbbe · a64fbbe
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 # Periodic Boundary Exercise
-For this exercise we use [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/eisenforschung/periodic-boundary-exercise/main?labpath=periodic-boundary-exercise.ipynb). 
+For this exercise we use [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/eisenforschung/periodic-boundary-exercise/HEAD?labpath=periodic-boundary-exercise.ipynb).