Polyakov action
Sign in to saveaction describing the worldsheet of a string in string theory
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history of string theory
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non-linear sigma model
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string theory
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vertex operator algebra
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black brane
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physics
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Black hole
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Standard Model
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David Gross
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Gerard 't Hooft
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holography
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quantum field theory
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multiverse
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graviton
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Michio Kaku
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Fourier series
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Lorentz transformation
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quantum electrodynamics
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