djanni_unchained's latest activity
-
djanni_unchained reacted to PeterDonis's post in the thread B Understanding the active/passive transformation of a scalar field with
Like.
Shouldn't it just be ##\Phi(\mathcal{P}): M \mapsto \mathbb{R}##? A scalar is just a number, not a 4-tuple of numbers. These... -
djanni_unchained reacted to Ibix's post in the thread A How do we interpret measurements of Mercury's position? with Like.
##\phi## does have the same meaning, actually, so that isn't an issue. And we're looking at a rate of change of a ##\phi## coordinate...
-
djanni_unchained posted the thread A How do we interpret measurements of Mercury's position? in Special and General Relativity.When scientists measured the position of Mercury in the 18th century, they interpreted the results assuming a Euclidean background...