Sandkasten

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Start!

Erster Basisvektor | $e_1=\begin{pmatrix}1\\0\\0\end{pmatrix}$ ^ Länge eines Vektors | $\vec{v} = \sqrt{v \cdot v} = \sqrt{v_1\cdot v_1 + v_2\cdot v_2+v_3\cdot v_3}$ ^

spaces.py

if True:
    print("OK")
print("done")