Skip to main content
11 events
when toggle format what by license comment
Nov 12, 2023 at 18:44 comment added Sidharth Ghoshal I might be curious in the opposite direction, is there an easy way to go form intrinsic to extrinsic. The whitney embedding theorem states any smooth $n$ manifold can me embedded into $2n$ dimensional euclidean space so there ought to be for example a purely extrinsic presentation of general relativity in $\mathbb{R}^8$
Feb 24, 2016 at 16:53 history edited Michael Hardy CC BY-SA 3.0
added 1 character in body; edited title
Sep 14, 2013 at 0:21 history edited Ricardo Andrade CC BY-SA 3.0
replaced inapplicable tag 'na.numerical-analysis'; minor corrections
Sep 13, 2013 at 23:50 answer added Victor Lehenkyi timeline score: 1
May 24, 2013 at 13:33 vote accept HYYY
May 23, 2013 at 23:01 comment added Deane Yang Could you be more precise by what you mean by "co-ordinate-free"? I can think of at least two ways of doing this. One is to write the system of PDE's in terms of connections and sections of, as well as maps between, the appropriate vector bundles. Another way is to write the system purely in terms of differential forms (this is called an "exterior differential system").
May 23, 2013 at 20:06 answer added Bazin timeline score: 8
May 23, 2013 at 17:32 comment added jjcale An example are maxwells equations, see en.wikipedia.org/wiki/Maxwell%27s_equations.
May 23, 2013 at 15:28 answer added Liviu Nicolaescu timeline score: 2
May 23, 2013 at 12:26 answer added Igor Khavkine timeline score: 40
May 23, 2013 at 11:10 history asked HYYY CC BY-SA 3.0