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Oct 7, 2020 at 20:25 comment added Iosif Pinelis @Wolfgang : I don't know if the condition $E|X|^2<\infty$ is necessary here. I see that your posted question "Is there a corresponding result" did not say anything about minimal assumptions.
Oct 7, 2020 at 16:56 comment added Wolfgang Thank you again. About minimal moment assumptions, on the real line, the second moment is necessary and sufficient for the law of the iterated logarithm to hold. Do I understand correctly that it is the same in Hilbert space with the condition E(|X|^2) finite?
Oct 7, 2020 at 15:27 history edited Iosif Pinelis CC BY-SA 4.0
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Oct 7, 2020 at 15:24 comment added Iosif Pinelis @Wolfgang : I have added details showing that your one-dimensional law of the iterated logarithm extends almost literally to Hilbert spaces.
Oct 7, 2020 at 15:21 history edited Iosif Pinelis CC BY-SA 4.0
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Oct 7, 2020 at 8:46 comment added Wolfgang Thank you for the reference. I would be also interested in the minimal assumptions for such a property to hold.
Oct 6, 2020 at 14:37 history edited Iosif Pinelis CC BY-SA 4.0
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Oct 6, 2020 at 14:28 history answered Iosif Pinelis CC BY-SA 4.0