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Jun 30, 2018 at 0:05 history edited skd CC BY-SA 4.0
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Jun 30, 2018 at 0:03 comment added skd @StefanoAriotta, yup, that's a typo, I was thinking about G_m when writing that paragraph. Thanks!
Jun 29, 2018 at 20:29 comment added Stefano Ariotta That's a great answer. I have just one small remark. I think that $\operatorname{Spec}(R\otimes_{\mathbb S} \Sigma_+^\infty \mathbb Z)$, with $\mathbb Z$ viewed as a discrete (grouplike) $\mathbb E_\infty$-monoid, is the "flat analogue" of $\mathbb G_m$, whereas the "flat affine line" should be $\operatorname{Spec}(R\otimes_{\mathbb S} \Sigma_+^\infty \mathbb N)$, with $\mathbb N$ viewed as a discrete $\mathbb E_\infty$-monoid.
Jun 21, 2018 at 3:13 comment added skd Note that Jeremy's theorem is much stronger than the result that I cited.
Jun 21, 2018 at 3:04 history edited skd CC BY-SA 4.0
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Jun 19, 2018 at 17:52 history edited skd CC BY-SA 4.0
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Jun 19, 2018 at 17:43 vote accept CommunityBot
Jun 19, 2018 at 17:42 comment added user74900 wow that cleared up some of my misunderstanding regarding the difference between SAG and DAG. Great answer!
Jun 19, 2018 at 17:39 history answered skd CC BY-SA 4.0