Forum Problem Lists Definitions FAQ

17.65 (2010)

Open

If Problem 17.64 has an affirmative answer, does it follow that, for some function $g(p)$, the number of isomorphism classes of $g(p)$-approximations to $J$ is
$\qquad$ a) countable?
$\qquad$ b) one?

Note that if, for some $g(p)$, there are only finitely many isomorphism classes, then for some $h(p)$ there is only one.

Contributor: C. R. Leedham-Green

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