Commit 2022-09-20 05:26 0a67ddd4

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feat(topology/separation): define regular_space (#16360)

Estimated changes

modified theorem has_sum.prod_fiberwise
modified theorem has_sum.sigma
modified theorem summable.sigma'
modified theorem summable.sigma
modified theorem tsum_comm'
modified theorem tsum_prod'
modified theorem tsum_sigma'