Tamas 3b3056c916 resolving version issues vor 2 Wochen
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bonds.ipynb 3b3056c916 resolving version issues vor 2 Wochen
lilla.ipynb 3b3056c916 resolving version issues vor 2 Wochen
lucy.ipynb 0d8a03c29f course created, lilla, lucy moved over vor 2 Jahren