本文为学习MIT8.962 广义相对论课程的第二篇笔记 第二节与第三节: Introduction to tensors & Tensor continued Video Link 1 Video Link 2本节讲述以 度规张量形式定义的标量机(内积),以及(洛伦兹)不变量等…
In Euclidean space, where is the Kronecker delta (which is 0 for and 1 for ), reproducing the usual form of the Pythagorean theorem (2) In this way, the metric tensor can be thought of as a tool by which geometrical characteristics of a space can be "arithmetized" by way of intr...
The geometric objects on a nonholonomic manifold \textbf{V} enabled with a N-connection structure \textbf{N} are called distinguished (i.e d-objects, d-vectors, d-tensors etc) if they are adapted to the N–connection structure via corresponding decompositions with respect to frames of type ...
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Open Access Policy Institutional Open Access Program Special Issues Guidelines Editorial Process Research and Publication Ethics Article Processing Charges Awards Testimonials Editing Services Initiatives Sciforum MDPI Books Preprints.org Scilit SciProfiles Encyclopedia JAMS Proceedings Series About Overview ...