## nt.number theory – Full measure properties for Zariski open subsets in \$p\$-adic situation

Let $$F$$ be a $$p$$-adic field and let $$X$$ be a smooth integral variety over $$F$$ (I am chiefly interested in the case when $$X$$ is a connected reductive group over $$F$$). Let $$U$$ be a non-empty open subset of $$X$$ with complement $$Z$$.

We can endow $$X(F)$$ with the Serre-Oesterle measure (e.g. as in (1,Section 2.2) or (2, Section 7.4))–this is just the standard measure coming from a top form of $$X$$).

My question is then whether one knows a simple proof/reference for the following:

The subset $$Z(F)$$ of $$X(F)$$ has measure zero.

I think this is proven in (1, Lemma 2.14)–but this is concerned with a more specific context which makes it non-ideal as a reference.

Any help is appreciated!

(1) http://www.math.uni-bonn.de/people/huybrech/Magni.pdf

(2) Igusa, J.I., 2007. An introduction to the theory of local zeta functions (Vol. 14). American Mathematical Soc..

## covid 19 – Extend USA B2 Tourist Visa (for My Mother) stay under COVID19 + Flight ban situation

My Mother (63 yrs) is currently visiting me from India on B2 visa.
Now her I94 is valid till Sept 15 this year (visa is 10 yrs). Due to COVID19 India has flight ban imposed, and till now we dont have dates when the flights are going to resume. So I can see there is an option for requesting stay extension by filing a I539 with documents supported and I131 as I (son) will be her sponsor for stay and all expenses. We are looking for a stay request extension for max couple of months.
Now the questions are –

1. How long it takes to get a decision (approval or rejection) in such cases ?
2. What is the best time to file the extension request considering we have still 60+ days till the I94 expire in Sept 15.?
3. If I file now, and we get rejection of extension of stay (before the current I94 expires), do my mother need to leave immediately or she can stay till the current I94 date (which is Sept 15)?
4. If we get the rejection after I94 has expired (Sept 15), how many days she will have to leave the country? Does she accrues out of status in this case? and does the B2 visa (10 yrs validity) gets void as well?
5. Last case – we file extension, we don’t get any decision quickly, but she leaves before getting the decision (approval or rejection, say she leaves at October end). In this case is she good in status, means no out of status and visa void?

## recursion – How to deail with a hypothetical situation in which a pub/sub cycle gets into an unending recursive loop?

It depends on the tech involved, but in general, messages flood the hell out of each publisher and you quickly find out where the limitations of your system lie.

Subscribers that take the most time/cpu won’t keep up with the flood, and will either keel over due to the load or accumulate pending messages until something in the subscriber queue runs out of resources and breaks.

In the case of synchronous in-process events (like .NET’s events), it will look like your standard faire infinite loop – though harder to identify and harder to debug.

Instrumentation should catch the exponential growth, but probably not quick enough. Depending on the situation, throttling can be put into place so the pub isn’t flooded with messages – but there aren’t great failure modes for that. And this sort of flood can look very similar to normal traffic spikes due to say… a Black Friday sale.

For internal only events, documentation and communication will create hierarchies of events so there aren’t cycles. Humans will make mistakes of course.

## what situation will lead the fabric network to a state fork

I have a question about in what situation it will lead the fabric network to a state fork?
I had met the state fork, see The mismatch of chaincode verison within fabric peers and MVCC_READ_CONFLICT error when update the fabric chaincode with composer, but I am not very certain about the reason. The offline peer will receive the txs and blocks from the orders and other peers when it is up.

## ssh – how would a 12-digit password be a safe guard in this situation?

So guys, I messed up with the configs in a computer and let the SSH server open to the wild with ROOT login enabled. I’m trying to assess the potential damages, which I may never know for sure.

Regrets apart, this mistake lasted for over a year until I verified several SSH authentication attempts in secure.log (botnets and/or skiddies) with random users, but some tried with root. The secure.log shows that all root connection attempts failed and no break-in evidence, but I may not rely on those logs anymore.

My hopes resort in the fact that I changed the default SSH port (not really a security measure) plus a 12-digit password (capital and noncapital letters plus symbols, so 72^12 possibilities), however I don’t know if a 12-digit password is really worth a security matter these days. Even considering a swarm of botnets (between 300k to 6M), it would take years to break the password, but DoS and DDoS are other possibilities and I wanna try to reach some peace of mind.

Unfortunately, I had to format and re-install Linux in this computer given ongoing needs, but I’ve kept /var/log/ files in case of an investigation. The network admin (the computer wasn’t at my home) didn’t notice any suspicious activity, then I came up with a few possibilities after some research:

1. OK scenario: password was worth its length and hold any intruder.

Possible solution: harden security and (even) keep the OS.

Comment: the intruder may have cleared the logs to trick me, so better to be sure and format anyway.

1. Bad, but manageable scenario: someone managed to connect and setup a botnet/spammer/bitcoin miner.

Possible solution: format computer and harden security.

Comment: no suspicious network activity had been noticed and I’d have noticed some CPU stress and/or other symptoms, but none seen. However, I used only SSH terminal with no graphic interface (tty) in this computer, so symptoms would be possibly less evident (?).

1. Really a bad scenario: intruder accessed my computer and stole my data.

Possible solution: format computer and harden security.

Comment: OK I’d need to live with that, but the hardware would be reusable.

1. Worst-case scenario: intruder break-in plus a rootkit/keylogger/sniffer/worm.

Possible solution: format computer and harden security, unless a more serious intervention had been done, like BIOS or HDD/SSD firmware virus/rootkit.

Comment: I believe a hardware-level threat means game over for MB and SSD/HDD.

In summary: (1) would be fine; (2) seems very unlikely, since no alarms were triggered, (3) is bad, but hardware still OK, and (4) is the worst scenario. I believe a compromised root password is way worse than getting a rootkit from some suspicious downloaded app (just guessing), especially if it is nested into the hardware.

Therefore, scenario (4) worries me and I presume I don’t have any means to find out if my computer had an intervention at hardware level. Per my research, BIOS and SSD/HDD firmware hacks are possible and usually meant for high-level targets (not my case), but rare for ordinary users and very hardware-dependent (I found lots of debate on internet).

Any thought/ideas/suggestions in ways I could verify my hardware are appreciated.

## Best hosting option in Asia for my situation?

Hello,

I am looking to host a static website, which will be visited mainly from a south asian country, so target client base is in south asia. I was debating a vps in singapore, but I am not sure about who to go for or work with. The potential for this project to grow is massive, which is why I was debating a company that we can grow with without much trouble. Was debating maybe hosting it on AWS and then do a mirror for the local clients, so the load speed is faster. I am a newbie in all of this, so any advice or suggestion will be greatly appreciated.

Thank you very much!

## dnd 3.5e – In this situation, what are the best tactical uses for at-will major creation?

Edit: This question may be moot. Based on the answer to this question: here, I may be deleting this question entirely, as it may be irrelevant. I appreciate everyone who has been thinking about this, but it may not be possible to use major creation tactically at all.

The party is about to face in battle a beholderkin, an overseer (Lord of Madness 139–40) and its allies:

• a beholder (Monster Manual 25–7)
• 2 directors (LoM 137–8)
• 7 spectators (LoM 140–1)
• 8 gauths (MM 26)

Additionally, the overseer has has successfully used its dominate person eye ray against a blue thrallherd who commands a small army of goblins. The overseer is aware of the party’s capabilities.

The PCs are tier 4 and level 11 with typical wealth for their level. The PCs include an adept/church inquisitor, a fighter/rogue/master thrower, a ranger/halfling outrider, and a warlock. They will have the assistance of an NPC pirate crew that consists of the captain (an ECL 11 bard/marshal/legendary captain), the first mate (an ECL 11 ninja/scarlet corsair), the big guy (an ECL 8 barbarian/war hulk), the ship’s mage (an ECL 6 warmage), and a handful of other crew members who probably won’t matter in a fight against such creatures.

The PCs plan to suppress temporarily the overseer’s domination of the blue with protection from evil spells and make 11-min.-at-a-time alliances with the blue and its army in hopes that the goblins’ll wreck a few eyeball monsters for the PCs.

As a being of vast intellect (Int 20!), the overseer has likely considered this eventuality and has contingencies for its contingencies for when the goblins eventually revolt. (Some of these contingencies might involve its major creation eye ray? See below.)

I expect that the actual beholder will be slain—perhaps by the overseer itself—in the ensuing goblin-beholder(kin) battle. (The overseer’s plan all along to remove its potential rival anyway.) So after the party dispatches the remaining lesser beholderkin, it’ll be time for the PCs to go mano-a-ojo against the overseer itself.

And it’s for this final battle that I want to maximize the overseer’s tactics. I can do that for everything that the overseer can do (which is a lot) except that I’m struggling with the overseer’s major creation eye ray.

The description of the overseer’s major creation eye ray says that an overseer uses it to create for itself or its minions useful miscellaneous gear. Lords of Madness has some beholder magic items, but it makes no suggestions as to what sort of mundane items an overseer would find useful, be it in battle or just to have sitting around for anywhere from over a day (if vegetable matter) to only 90 seconds (if a rare metal). (Its caster level for its eye rays is 14.)

An RPGNet thread has a list of 101 uses for the major creation spell, but many of those suggestions assume a mundane humanoid is employing the spell rather than an extremely powerful magical tree-eyeball monster.

How would an overseer in this situation employ optimally its major creation eye ray?

Note: an overseer’s major creation eye ray is a supernatural ability which requires a full round action (which replaces the standard 10 minute casting time of the spell). Since the eye rays are supernatural, they cannot be disrupted and never require concentration checks. So, I am mainly looking for uses during combat.

## The following information may help to resolve the situation in kali linux

``````\$ sudo apt-get dist-upgrade
Building dependency tree
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
libc6-dev : Breaks: libgcc-9-dev (< 9.3.0-5~) but 9.2.1-22 is to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
``````

How do I solve the error?

## My group is too big for my game, how to manage this situation?

So I may have a happy problem. I just finished a game with a group of five players, all of them enjoyed it and we’ve been talking about the next game we would start. None of them are problem players, none of them will refuse the invitation (I think) and ultimately all of them are fiends and will know if one is excluded.
However, I find five players to be too much for me : due to the nature of the game we play, the kind of situations I like to set up and the time it takes to go through so many people while having some RP in there. All of that is too much for the 2.5-3h sessions we tend do prefer.

So… How can I, as a GM, deal with a group that’s too big for me if I don’t want to force someone out?

In a perfect world, one or two of the players would drop out of the game of their own volitions.
But realistically, I would like to drop one or two, which I don’t know how to go about making it happen, or make the game more manageable for the group I have.

Here are a few complications I have :

• Everyone is friend of everyone else, so merely not inviting someone is just excluding them and hoping they don’t notice or don’t mind being left out.
• Likewise, everyone seem to be looking forward to the next setting. So I don’t expect anyone to turn down the game unless there is a big change of playstyle.
• There are no obvious problem-players. The worst I have are follow-along-players. So I have no real ground to expel anyone.
• The playstyle I’ve found most enjoyable is one of low-combat and more RP and problem solving. Making kind of hard to engage five people.
• I also find I like to take the time to RP a bit even when resolving mostly basic rolls, so that resolving a full day’s exploration in a single roll and narating the result is not something I want to do frequently.

I found some question close to mine on the site, the closest I have is this one :How can I manage a party that has grown too big?. But it doesn’t help my problem. Mostly because on the focus on Roll20 and dnd (we run a homebrew system for which the closest comparison I have is : Dungeon World with crunchier combat).

For reference, Here are the main avenues I had in mind in case I still have five players for a while.

• Run the next game in a Westmarch-like style. Off-loading the burden of who is present to the players and giving me a reason to apply time pressure on the players. I’m not sure how feasable this is and may have to resort to selecting two nights instead of one. Based on our current speed. I can’t see how we could run a satisfying game in such a short time (that is partly my fault).
• Keep the group and keep a close eye on the playtime IRL, keep things focussed. This is what I’ve been doing and I know it has the side-effect of giving little to no spotlight on the players who goes in the wrong direction and the difference between right and wrong direction is jarring in my narration (and I know some players noticed a few time). If someone decides to leave because of it… I can slow down because I have a more manageable group now. If noone dislike it, then I may be alright. But that is not the kind of game I’d like to run.
• Keep the group and enforce a strict no-splitting rule. See how it goes. I tend to find 5players+NPCs scenes tough to run and I expect the two least vocal players to just quit talking in such a game. But I can’t find another