7:38 AM
Several users complained on meta about not enough attention for featured questions: Is bounties period sufficient? and Why is it not possible to offer a bounty for longer than 7 days?
Maybe it would be reasonable to have a place where past bounty question are listed.
Of course, you can also find past bounties using SEDE:
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In a related thread, it was pointed out that it seems that some users would consider having somewhere complete list of past bounties a good idea While it does not do much for extending the bounty period (including very prominent advertising, and the reputation award for people who answer), ...

AFAICT it is not possible to make a chat-feed with all featured questions: Why doesn't this feed for featured questions work?
But maybe if we add the most popular tags (or even all top-level tags) this could work similarly. (Although question with two top-level tags will be shown twice.)
At least in theory, every question on MO should have a top-level tag: Frequently asked questions about tagging on MathOverflow and Why are MO tags formatted as they are?

Martin Sleziak has made a change to the feeds posted into this room‌​
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I'm trying to understand whether there's a fully faithful functor $LRS \supset FormalSch \to IndSch$ and in what sense. Here's my progress so far: Let $\mathsf{A}$ be the category of adic rings. The objects are topological rings whose topology is generated by a descending filtration of ideals wh...

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Let $P_1, \ldots, P_m$, $Q_1, \ldots, Q_k \in \mathbb{C}[x_0,\ldots,x_n]$ be linear homogenous polynomials. Let $f$ be a homogenous quadratic polynomial of degree $2$. Assume that for every $i$ and for every $j$ the polynomial $f$ belongs to the ideal $\langle P_i, Q_j \rangle$. Is it true that...

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(This is inspired by Algebraic geometry examples.) I want to collect here (counter)examples in arithmetic geometry. Curves violating the Hasse principle: The Selmer curve $3X^3 + 4Y^3 + 5Z^3 = 0$. It is a nontrivial element of the Tate–Shafarevich group of the elliptic curve $3\cdot4\cdot5\cdo... 1 A Banach space$X$is said to have w-FPP (weak fixed point property) if for every non-empty, weakly compact and convex subset$K\subseteq X$; every non-expansing mapping$T:K\longmapsto K$i.e. $$\|Tx-Ty\|\leq \|x-y\|\quad\quad \forall\, x,y \in K$$ has a fixed point. Recall that if$X$has an... 4 Suppose that$b$is a braid. Then$b$can be uniquely written as$D_{RL}(b)^{-1}N_{RL}(b)$where$D_{RL}(b),N_{RL}(b)$are the unique positive braids such that$b=D_{RL}(b)^{-1}N_{RL}(b)$and where$D_{RL}(b)^{-1}\wedge_{L}N_{RL}(b)=e$where$r\wedge_{L}s$denotes the left gcd of the positive bra... 2 hours later… 10:09 AM Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ Martin Sleziak has made a change to the feeds posted into this room‌​ 19 Suppose from distance$d$, while driving at speed$v_0$, I notice that there's a red traffic light in front of me. Suppose that there are no other vehicles, my vehicle has perfect brakes, my maximum acceleration is$a$and the red light will turn green according to some$\mu$distribution. My goa... 0 Given a finite dimensional algebra$A$with Jacobson radical$J$(defined as the intersection of all maximal right ideals of the algebra) and let$J^i$be the powers of this ideal. Let$injdim(M)$denote the injective dimension of a module$M$. Questions: Do we have$injdim(J) \geq in...

I believe all top-level tags listed in this answer should have feed in this room now.
The three tags which changed their names since that answer are posted under the new names:
in Math Mods' Office, Nov 28 at 2:14, by Martin Sleziak
Some of the top-level tags on MO have changed their names after increase to 35 character limit: is now (ca.classical-analysis-and-odes), is now (oc.optimization-and-control) and is now (kt.k-theory-and-homology).
Maybe some other popular/big tags should be also included? See: Which “non-arxiv” tags are de facto top-level tags?
I have included simply because it is atm the third largest tag on MO.

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I am looking for a reference on continuity of (proximal) subdifferentials. For a continuous function $F: \mathbb R^n \rightarrow \mathbb R$, a vector $v$ is called proximal subgradient at $x$ if there exist $r>0, \delta >0$ s. t. \forall y \; \text{s. t.} \; \|y-x\| \le r \quad F(y) \le F(x) +...

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2:10 PM
Martin Sleziak has made a change to the feeds posted into this room‌​
Martin Sleziak has made a change to the feeds posted into this room‌​
Martin Sleziak has made a change to the feeds posted into this room‌​
Martin Sleziak has made a change to the feeds posted into this room‌​
Martin Sleziak has made a change to the feeds posted into this room‌​
Martin Sleziak has made a change to the feeds posted into this room‌​
Martin Sleziak has made a change to the feeds posted into this room‌​
Martin Sleziak has made a change to the feeds posted into this room‌​
Martin Sleziak has made a change to the feeds posted into this room‌​

Unless I have missed something, all arxiv-tags and the most popular non-arxiv tags should have a feed with featured posts in this room.
Maybe we can leave it for some time like this and we will see how it works.
I guess occasionally posting at least something in this room will be needed.
Posting a dummy post to keep the room from getting frozen. Just in case it could be useful in the future.
As an experiment I have created also this chat room. The idea was to add the feed with featured questions there. However, it seems that it is only possible to do this for questions in particular tag, there isn't a single feed with featured questions suitable for chat. The room was started today - we will see whether it is going to be useful for something; if not we can simply drop it. — Martin Sleziak 14 mins ago