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AWA
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In most cosmology books it says that historically there is only two(some include here also the Minkowski spacetime but I'd rather leave it aside since it is a flat spacetime) non-expanding cosmological models with lambda, the Einstein 1917 model and the de Sitter model, this last was afterwards shown to be actually expanding too with the right choice of coordinates.
I think it was Tolman who showed these are the only possible static models with Einstein equations containing the cosmological constant lambda.
I was wondering if historically there was ever proposed some non-expanding cosmological model without the lambda term, I've read somewhere it's not possible with the assumption of isotropy and homogeneity so I am only interested in terms of the history of cosmology.
I think it was Tolman who showed these are the only possible static models with Einstein equations containing the cosmological constant lambda.
I was wondering if historically there was ever proposed some non-expanding cosmological model without the lambda term, I've read somewhere it's not possible with the assumption of isotropy and homogeneity so I am only interested in terms of the history of cosmology.