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Results tagged with automorphism-groups
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user 16722
Questions about the group of automorphisms of any mathematical object $X$ endowed with a given structure, i.e the group of all bijective maps from $X$ to itself preserving this structure, and hence helping study it further and understand it better.
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.
…
- 577
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 …
- 577