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## Main Question or Discussion Point

What is the symmetry group of manifold which models our world in general relativity.

In special relativity this group is Poincare group. Its elements preserve standard lorentz

inner product. What structure is preserved by elements of symmetry group in GR

(sygnature of metric, maybe sth else?).

In special relativity this group is Poincare group. Its elements preserve standard lorentz

inner product. What structure is preserved by elements of symmetry group in GR

(sygnature of metric, maybe sth else?).