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A topological group is a group $G$ together with a topology on the elements of $G$ such that the group operation and group inverse function are both continuous (with respect to the topology).

3 votes
Accepted

Semigroup product of the left-invariant completion of a Polish group (restatement of Questio...

In the end it was the original question which was answered first. The answer to Is there a relational countable ultra-homogeneous structure whose countable substructures do not have the amalgamation …
Itaï BEN YAACOV's user avatar
5 votes
1 answer
340 views

Semigroup product of the left-invariant completion of a Polish group (restatement of Questio...

This is a re-statement, of sorts, of the question Is there a relational countable ultra-homogeneous structure whose countable substructures do not have the amalgamation property?, so far unanswered. …
Itaï BEN YAACOV's user avatar