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Oct 29, 2017 at 1:01 history edited sku CC BY-SA 3.0
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Oct 28, 2017 at 6:08 comment added reuns If $a_{n+k} = a_n$ and are integers then yes $\theta$ is modular of weight $1/2$ for some group, not necessary containing any $u \mapsto m/u$
Oct 28, 2017 at 6:04 comment added sku Good point. You think periodicity is the property that we need? If the sequence is periodic, then JI may hold true.
Oct 28, 2017 at 5:58 comment added reuns Of course for $a_n$ integers $\theta(u) = u^{-1/2}\theta(1/u)$ doesn't hold except in some very particular cases
Oct 28, 2017 at 5:52 review First posts
Oct 28, 2017 at 8:13
Oct 28, 2017 at 5:51 history answered sku CC BY-SA 3.0