例句與造句

1. The symmetry is called general covariance or diffeomorphism invariance.
2. Both gauge invariance and diffeomorphism invariance reflect a redundancy in the description of the system.
3. In canonical quantum gravity the difficulties in using the continuous loop representation are cured by the spatial diffeomorphism invariance of general relativity.
4. In ordinary circumstances the geometry of space is flat and Euclidean and the diffeomorphism invariance of general relativity is hidden thanks to this background field.
5. Later, Iso and Kawai reinterpreted this as a permutation symmetry of space-time events and argued that diffeomorphism invariance was included in this symmetry.
6. It's difficult to find diffeomorphism invariance in a sentence. 用diffeomorphism invariance造句挺難的
7. Shape dynamics is not formulated as an implementation of spacetime diffeomorphism invariance, but as an implementation of spatial relationalism based on spatial diffeomorphisms and spatial Weyl symmetry.
8. In fact, all the solutions constructed for Ashtekar's Hamiltonian constraint only vanished for finite regularization ( physics ), however, this violates spatial diffeomorphism invariance.
9. Ed Witten asked the question " What could the full symmetry group of string theory be if it includes diffeomorphism invariance on a spacetime with changing topology ? ".
10. The second step is to use the diffeomorphism invariance of the exterior derivative to try to isolate any other higher-order invariants of the " G "-structure.
11. The first class constraints of general relativity are the spatial diffeomorphism constraint and the Hamiltonian constraint ( also known as the Wheeler-De Witt equation ) and imprint the spatial and temporal diffeomorphism invariance of the theory respectively.
12. In fact Ashtekar's formulation may be thought of as ordinary \ mathrm { SU } ( 2 ) Yang Mills theory together with the following special constraints, resulting from diffeomorphism invariance, and a Hamiltonian that vanishes.
13. However, as a background in which gravitational fields ( or gravitons ) can operate, due to diffeomorphism invariance, the space on the macroscopic scale, is equivalent to any other ( open ) solution of Einstein's field equations.
14. This diffeomorphism invariance has an important implication : canonical quantum gravity will be manifestly finite as the ability to ` drag'the metric function over the bare manifold means that small and large ` distances'between abstractly defined coordinate points are gauge-equivalent!
15. This is problematic because a linearized theory of gravity, like Fierz-Pauli, is well-defined on its own but cannot interact with matter, as the coupling h ^ { \ mu \ nu } T _ { \ mu \ nu } breaks diffeomorphism invariance.