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An Unconventional Way in evaluating operator-valued Gaussian integrals
To hell with ordering at first, and ask for forgiveness later.
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Christofel symbol
A nice little derivation
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Taking complex conjugate of Fourier transform
First the wrong way, then the right way
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Tight-binding convention
Fourier transform convention for the 2nd quantized operators
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The first isomorphism theorem (incomplete)
probably one of the most used theorem in group theory