<math> (\left|x\right\rang \left|y\right\rang- \left|y\right\rang \left|x\right\rang) </math>... was my first lesson in quantum mechanics, and in a v… - John Clive Ward

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<math> (\left|x\right\rang \left|y\right\rang- \left|y\right\rang \left|x\right\rang) </math>... was my first lesson in quantum mechanics, and in a very real sense my last, since the rest is mere technique, which can be learnt from books.