例句與造句

1. In our expression for the metric, note that are null vector fields.
2. Note that if and, then, so that is a null vector.
3. Null vectors are also used in the Newman Penrose formalism approach to spacetime manifolds.
4. They are distinguished in that only for the latter there exists a nonzero null vector.
5. The four-frequency of a photon is always a future-pointing and null vector.
6. It's difficult to find null vectors in a sentence. 用null vectors造句挺難的
7. The set of all null vectors at an event of Minkowski space constitutes the light cone of that event.
8. They are normal vector can be expressed as a linear combination of two future directed null vectors, normalised by:
9. In general the norm of a composition algebra may be a quadratic form that is not definite and has null vectors.
10. Over the reals, if two null vectors are orthogonal ( zero Minkowski tensor value ), then they must be proportional.
11. The coefficients of the linear combination are determined so to best approximate, in a least squares sense, the null vector.
12. However, when discussing causal horizons, trapped null surfaces are defined as only null vector fields giving rise to null surfaces.
13. The same reversed form of the inequality holds if both vectors lie in the past light cone, and if one or both are null vectors.
14. All this radiation is traveling in the same direction, and the null vector k = \ partial _ v plays the role of a wave vector.
15. The four linearly independent biquaternions,,, and are null vectors and } } can serve as a basis for the subspace used to represent spacetime.
16. This possibility is a tensor analogue of the well known that a null vector always has vanishing length, even if it is not the zero vector.
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