10.7 (1986)

Solved

Is it true that in a countable group $G$, any non-discrete group topology satisfying the first axiom of countability can be strengthened up to a non-discrete group topology such that $G$ becomes a complete topological group?

Progress

Yes, it is (V. I. Arnautov, E. I. Kabanova, Siberian Math. J., 31 (1990), 1–10).

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