Talk:Curvature invariant (general relativity)/to do

Task for expert:

• add material explaining how the following are related to the principle invariants:
  1. characteristic polynomial of Riemann tensor (as operator on bivectors),
  2. Hodge duals of curvature two-forms,
  3. Fermi normal coordinate chart,
  4. electric-electric, electric-magnetic, magnetic-magnetic parts of Riemann tensor in GEM formalism (correspond essentially to electrogravitic, magnetogravitic, topogravitic parts).

Task for anyone:

• spell check
• improve diction
• note anything unclear on talk page

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