Lecture 10: Metric Manifolds (International Winter School on Gravity and Light 2015)

  Рет қаралды 46,552

The WE-Heraeus International Winter School on Gravity and Light

The WE-Heraeus International Winter School on Gravity and Light

Күн бұрын

Пікірлер: 7
@ErnestYAlumni
@ErnestYAlumni 9 жыл бұрын
This lecture is PACKED with a lot of GOOD stuff, explaining lucidly, explicitly, clearly, a lot of the tools needed in GR (and a lot of other places): Levi Civita connection, Ricci scalar, Ricci curvature, Riemann-christoffel curvature. This is truly a service, because a lot of other presentations are confusing.
@paoloziko
@paoloziko 9 жыл бұрын
+ErnestYAlumni can You answer my last post ? because I got confused when he explained the musical map and so on, I couldn't grasp that notion of non degeneracy... degeneracy of what?
@ErnestYAlumni
@ErnestYAlumni 9 жыл бұрын
I just checked this comment (you can also try to email or tweet me; etc. I don't check my KZbin very often). degeneracy of the metric, so essentially, if a metric is nondegenerate then (x,y)=0 and x != 0 (x is not zero) then y MUST BE zero. cf. en.wikipedia.org/wiki/Pseudo-Riemannian_manifold
@truebomba
@truebomba 8 жыл бұрын
Can you pleas point me in what lecture I can find explanation of the Tensor notation and the the tensor field function transformation low referred to in 21: 38
@paoloziko
@paoloziko 9 жыл бұрын
Hi , good lectures for sure. I'm still confused with the property of non degeneracy. Is it the inversibility of g or something else? please correct me if I'm mistaken. ty
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