A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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The Green-Schwarz formalism, or the superspace-formalism, are formalisms for supersymmetry with explicit spacetime supersymmetry.
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For questions about epistemology in the context of physics - what knowledge is, and how we arrive at it.
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The application of physics to the built environment, particularly with regard to the movement of heat, air, moisture, pollutants and light through buildings.
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if a more descriptive tag applies.
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Pieces of stone or metal originating elsewhere in the Solar System that have fallen through the atmosphere.
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A theory of interacting fields of arbitrary spin. Generalizes Yang-Mills as a theory of spin-one, gravity as a theory of spin-two to fields of any spin.
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A repulsive force that exists in quantum mechanics between identical fermions due to the Pauli exclusion principle.
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a method of isolating divergencies in scattering amplitudes.
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the study of quantum effects on small cavities, manifested in variations in the lifetimes of unstable energy levels
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the electromagnetic shock-wave due to a charged particle traveling through a medium faster than the speed of light in that medium.
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matter in a state that has properties between those of conventional liquid and those of solid crystal.
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the problem of finding the path between two points such that the transit time under specified conditions is minimized.
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