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# Monthly Archives: October 2017

## Variational principle and the infinite square well

Variational principle and the infinite square well

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## Variational principle and the harmonic oscillator

Variational principle and the harmonic oscillator

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## Wigner-Eckart Theorem – adding orbital and spin angular momenta

Wigner-Eckart Theorem – adding orbital and spin angular momenta

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## Wigner-Eckart Theorem – examples

Wigner-Eckart Theorem – examples

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## Spherical tensor operators; a scalar operator

Spherical tensor operators; a scalar operator

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## Symmetry of states formed from two equal spins

New post here

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## Projection operators for general L + spin-1/2

New post here.

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## Links and pingbacks

I’ve now added links back to the home page and comment blog in all PDF files, which should make navigating easier. I’ve also added a list of pingbacks at the bottom of each post. A pingback is a link from … Continue reading

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