I'm trying to understand how one can obtain M4 as the quotient space
ISO(3,1)/SO(3,1),
and equivalently de Sitter and Anti-de Sitter as
SO(4,1)/SO(3,1) and
SO(3,2)/SO(3,1), respectively. I.e. we can see these manifolds by taking their symmetry Lie group and quotienting by the normal Lorentz subgroup
SO(3,1).
This construction seems intuitive but I cannot find a decent reference where these steps are taken with a little more care. I would like to see M4 emerging from explicit group theoretical calculations (I'm not so familiar with group actions, orbits and all that).
Can anyone provide a nice and specific explanation without referencing to general theorems but starting from general grounds?
I'm not interested in deepening the construction coming from topology.. I know it is a general fact that one can construct a manifold given a transitive action of a Lie group, as the quotient of the Lie group by the stabilizer of a point.
Thank you!