共查询到20条相似文献,搜索用时 0 毫秒
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F. Constantinescu 《Annalen der Physik》2006,15(12):861-867
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Thomas A. Vilgis 《Physik in unserer Zeit》2004,35(6):292-292
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Examples of isotropic Kähler manifolds (i.e., J2=0) which are neither complex nor symplectic, and therefore not indefinite Kähler, are constructed. 相似文献
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We present the generalization to spacetime dimension D=4n+2 of the Lorentz covariant quadratic lagrangian for pairs of (anti)self-dual fields previously obtained by the authors in D=2. In the process BRST quantizing this lagrangian a first-order quadratic lagrangian for ghost (anti)self-dual fields is found which, after gauge fixing, can be written in terms of bispinors and it turns out to be a Kähler-Dirac lagrangian. The coupling to gravity is straightforward and the gravitational anomaly due to (anti)self-dual fields is obtained directly from an action principle. 相似文献
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Hans-Jürgen Treder 《Annalen der Physik》1990,502(7):591-594
Integrability, Irreversibility, and Cosmogony Leading the famous discussion with Boltzmann on the foundation of statistical thermodynamics Zermelo was backed by Planck himself. Zermelo's objections to Boltzmann's atomism and Boltzmann's answers are again vital today. After all Boltzmann founded statistical thermodynamics cosmogonically. 相似文献
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K. D. Kirchberg 《Journal of Geometry and Physics》1990,7(4):449-468
If M2m is a closed Kähler spin manifold of positive scalar curvature R, then each eigenvalue λ of type r (r {1, …, [(m + 1)/2]}) of the Dirac operator D satisfies the inequality λ2 ≥ rR0/4r − 2, where R0 is the minimum of R on M2m. Hence, if the complex dimension m is odd (even) we have the estimation for the first eigenvalue of D. In the paper is also considered the limiting case of the given inequalities. In the limiting case with m = 2r − 1 the manifold M2m must be Einstein. The manifolds S2, S2 × S2, S2 × T2, P3(
), F(
), P3(
) × T2 and F(
3) × T2, where F(
3) denotes the flag manifold and T2 the 2-dimensional flat torus, are examples for which the first eigenvalue of the Dirac operator realizes the limiting case of the corresponding inequality. In general, if M2m is an example of odd complex dimension m, then M2m × T2 is an example of even complex dimension m + 1. The limiting case is characterized by the fact that here appear eigenspinors of D2 which are Kählerian twistor-spinors. 相似文献
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H.-J. Treder 《Annalen der Physik》1987,499(2):137-144
Hermiticity and Gauge Invariance In the Theory of Hermitian Relativity (HRT) the postulates of hermiticity and gauge invariance are formulated in different ways, due to a different understanding of the idea of hermiticity. However all hermitian systems of equations have to satisfy Einstein's weak system of equations being equivalent to Einstein-Schrödinger equations. 相似文献
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