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发表于 2025-3-23 09:56:19
Three Lectures on String Theory,al techniques. In three lectures it is only possible to skim the surface of this rapidly developing theory, pointing out the main features and explaining, at a pedestrian level, some of the important ideas. In the first lecture, Section 1,1 give a “pep-talk,” a broad review of string theory: why it
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发表于 2025-3-23 14:17:41
BRST Symmetry in the Classical and Quantum Theories of Gauge Systems,ory. These methods are not only useful in the path integral formalism, where the BRST generator is an essential building block of the effective action, but also they find important applications in the operator formulation of the theory. For instance, in string theory, one finds that nilpotency of th
hidebound
发表于 2025-3-23 18:35:02
Update on Anomalous Theories,tries of massless (Weyl) fermions, the former in any even-dimensional space-time, the latter in space-times with dimensionality 4. + 2, . = 0,1,.... [Similar quantum breaking afflicts discrete symmetries . in odd dimensions, and scale/conformai symmetries in any dimension; we shall not be concerned
Decongestant
发表于 2025-3-23 23:12:10
The Relativistic String and Its Nonrelativistic Disguises,. String theory goes back to the work of Nambu and Veneziano, and in this chapter we take a new look at the Nambu string in interaction with a multiple-valued field. Although the interaction is local, the action integral involves not only the world surface of the (closed) string but also the volume
巨硕
发表于 2025-3-24 05:19:42
The Gravitational Path Integral and Critical Dimensions of Linear and Nonlinear Locally Supersymmetymmetry transformation and using the fact that the classical action is invariant under this symmetry. When the measure is invariant under the symmetry transformation one obtains only contributions from the action and external sources. For rigid symmetries, one first replaces the parameter by a local
sulcus
发表于 2025-3-24 07:24:31
Grassmannian Space-Time Structure as an Origin of Gauge Symmetries,nates should be counted negatively, as violating the physical statistics . This is a further indication, in our belief, that it constitutes an appropriate kinematical framework for the description of massless gauge fields. The use of this space has already provided simple descriptions of these
insurrection
发表于 2025-3-24 14:00:15
The Relativistic String and Its Nonrelativistic Disguises,y in spite of the very impressive progress made in recent years in the study of the transition mechanisms leading from orderly to chaotic motion , and an assessment of the role of compressibility and sound emission is relevant as a matter of principle so as to get a handle on a possible diagnosti
MIRTH
发表于 2025-3-24 17:57:54
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甜得发腻
发表于 2025-3-24 20:23:21
Stephen L. Adlerables with regular survey data, when new information about the economy are flowing in continuously. The delays in the production of input-output tables can seriously undermine the effective estimation of policy models for these countries. Thus there are needs for appropriate and practically feasible
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发表于 2025-3-25 02:05:28
Carlos Aragone,A. Khoudeirtical fundamentals, through algorithm development to the application of the method in, for instance, aeroplane flight dynamics or biological sequence analysis. The technical material is illustrated by the use of worked examples and methods for training the algorithms are included..Dynamic Systems Mo