Quantum redactiones paginae "Chemia quantica" differant
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+ {1 \over r^2 \sin \theta} {\partial \over \partial \theta}
\left( \sin \theta {\partial \over \partial \theta} \right)
+ {1 \over r^2\sin^2 \theta} {\partial^2 \over \partial \varphi^2}.</math>
==== Atomi cum pluribus electronibus ====
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