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It is not the case that The choice of topology in de Sitter space reflects a choice of global identification, not an intrinsic feature of the local metric solution.
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Reasons For
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Reason for
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1.
Topology constrains the causal structure and symmetry group; these influence local physics near horizons and are not purely global abstractions.
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2.
If topology were merely conventional, observational predictions (particle production rates, correlation functions) should be independent of it—yet they vary.
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3.
The distinction between 'local metric' and 'global identification' conflates mathematical description with physical geometry; spacetime structure is inherently unified.
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Reasons Against
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Reason against
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1.
The de Sitter metric is locally determined by Einstein equations; topology emerges only when specifying boundary conditions globally.
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2.
Multiple topologies (flat, compact, hyperbolic spatial sections) satisfy identical local curvature constraints, proving topology is an additional choice.
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3.
Physical observables in local regions remain invariant under global identifications, supporting the distinction between local metric and global structure.
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