skysight-inc/HackerNews huggingface dataset:
Another elementary proof of this is in Yaglom and Yaglom's delightful "Challenging Mathematical Problems With Elementary Solutions (Volume 2)", which is available as an inexpensive Dover edition [1].

It's problem #147. It asks you to deduce Wallis' formula from the identities that problem #143 asks you to prove. Those are:

sin(pi/2m) sin(2pi/2m) sin(3pi/2m)...sin((m-1)pi/2m) = sqrt(m)/2^(m-1)

sin(pi/4m) sin(3pi/4m) sin(5pi/4m)...sin((2m-1)pi/4m) = sqrt(2)/2^m

There is also a "Challenging Mathematical Problems With Elementary Solutions (Volume 1)", also available as an inexpensive Dover edition and, unlike Volume 2, available as en ebook [2].

Volume I's problems are divided into the following categories: introductory problems; the representation of integers as sums and products; combinatorial problems on the chessboard; geometric problems on combinatorial analysis; problems on the binomial coefficients; problems on computing probabilities; experiments with infinitely many possible outcomes; and experiments with a continuum of possible outcomes.

Volume II's problems are divided into the following categories: points and lines; lattices of points in the plane; topology; a property of the reciprocals of integers; convex polygons; some properties of sequences of integers; distributions of objects; nondecimal counting; polygons with minimal deviation from zero (Tchebychev polynomials); four formulas for pi; the calculation of areas of regions bounded by curves; some remarkable limits; and the theory of primes.

These have some fun and surprising problems. For instance, problem 119 of Volume 2: Let a=1/n be the reciprocal of a positive integer. Let A and B be two points of the plane such that the segment AB has length 1. Prove that every continuous curve joining A to B has a chord parallel to AB and of length a. Show that if a is not the reciprocal of an integer, then there is a continuous curve joining A to B which has no such chord of length a.

After the problems the books provide hints, and after the hints full solutions are provided.

[1] https://www.amazon.com/Challenging-Mathematical-Problems-Ele...

[2] https://www.amazon.com/Challenging-Mathematical-Problems-Ele...
Dag. I know one of the few issues I have with my LG G4 was it getting hot when it was set to force GPU rendering. Hopefully an update should take care of it.
While the dialog around various equity-based incentive compensation mechanisms is good, this article is off base in SO many ways:

>>With an often high strike price,

Only an issue at the later stages of companies (note: this writeup argues RSUs "from the beginning").

>>a large tax burden on execution due to AMT,

Only if you are exercising later in the company stage, when the fair market value has (usually) gone up. If you are bullish on the company, it's generally best to exercise as you vest, for this very reason.

Also, exercising as you vest gets the timer going for (a) cap gains treatment (much better tax rates), AND, a possible Qualified Small Business Stock tax exclusion (5yr holding, significant tax break).

>>and a 90 day execution window after leaving the company many share options are left unexecuted.

This is MUCH less of an issue if you are exercising as you go along (see above).

If you you have just left a large unicorn private company, there are often secondary buyers for the stock. You could exercise and sell some stock to them to cover your exercise cost.

Regarding RSUs, you HAVE TO PAY TAX AS YOU VEST. For a private company, you're just replacing one potential problem (AMT with option exercises) with a very specific actual problem (steady tax liability as without liquidity).

RSUs are a very useful compensation tool, but you can't declare them unilaterally better. ALL equity compensation forms require some "user sophistication", including options and RSUs.

If you don't understand how to optimize your situation, get advice from someone who does!
Interesting times ahead. The purchase of the tract in Fiji is an ordinary land deal and does not imply a transfer of sovereignty. If the population of the Republic of Kiribati eventually relocates to this tract, what will be their legal status in Fiji? Citizens of Fiji, or refugees?

If the islands of Kiribati are underwater, other governments may come to challenge their claim to vast amounts of the Pacific [1]

[1] Maritime boundaries and claims: https://imgur.com/KbGj1mC
Depends on # of kids. Many great schools are well under 10k/year, but that's only so useful if you have 5 kids.
Suiteness (YC S16) wants you to stay in a suite
> I don't know that this is quite true. I have asked many employers for fewer hours and more vacation time in exchange for less money. I am always refused. I am frequently offered more money but never more vacation time.

I've managed, once, to get the full vacation time for seniority (i.e. At N years you get +1 week) by threatening to quit after being offered a 5 figure raise.

So I'd agree with you. I've never known anyone to get away with pushing past the upper limit on their seniority track for vacation.
Ask HN: How important is persuasion to your career?
Hey HN – how important is persuasion to your career?

On a thread a while back, one commenter had really positive things to say about it. I’m curious if other people feel the same way.

Here’s what they said:

“There are some people that are magical. You go into a meeting with your mind made up, and then 30 minutes later, you leave the meeting with a completely different mindset. And you don't know how they managed to convince you so successfully. If you could figure that trick out, most of your non-technical career problems would be solved.

I've personally never learned this skill of persuasiveness, but I'd pay a lot of money if someone could teach me quickly.”

I'm talking about the kind of person who is so good at persuasiveness that they convince you without you even realizing it. That's a totally different skillset from "argue until your opponent is exhausted and gives up". I had a coworker once that was pretty good at this. I'd go into a meeting with a strategy that I was positive would work, and I'd walk out of that meeting with his strategy -- and somehow I was convinced it was even better than my original one! (Sometimes it was, sometimes it wasn't, but I never resented him if it wasn't -- because he always somehow made it seem like it was the natural choice, not just his choice.)

Anyway, that's the kind of thing i'm talking about. It's easy to talk over people and beat them over the head til they do what you want. I'm more interested in getting everyone on my side and excited about it.”

original thread - https://news.ycombinator.com/item?id=11869688
"Our competitive advantage is Chinese regulations blocking a social network and some domestic market filters" - One can change overnight and two can be pretty easily matched by a deep pocketed competitor who wants to enter your market. I could see these places being ghost towns in 2 or 3 years.
That's given the techniques used so far. See the recent work by the Lewis group [1] which uses a new method to culture soil bacteria to identify new antibiotics and opens up an entirely new pipeline. Previously, we've never been able to keep these strains of bacteria alive, but now we're able to allowing for sequencing and isolation of tons of new antibiotics. It's estimated that we'll be using this new technique for a long time.

New antibiotic finds are black swan events, they tend to come from new areas that unless you specifically are looking there, you're not going to find. It's like an oil well, and the usage of the the few "last-resort" antibiotics, which ones get produced and sold, is highly controlled by a handful of pharma companies so they eke out whatever monetary value is left.

[1] http://www.nature.com/nature/journal/v517/n7535/full/nature1...
https://directorsblog.nih.gov/2015/01/13/digging-up-new-anti...
http://www.the-scientist.com/?articles.view/articleNo/41850/...
http://www.npr.org/sections/health-shots/2015/01/07/37561616...
http://www.smithsonianmag.com/science-nature/new-antibiotic-...
Building of Questions-Answers Community App Part1
There are a finite number of instant-provisioning VM/VPS hosts that such an organization can use, in terms of ASNs and IP blocks which are easily identified by netflix. Once Netflix has blocked a /22 or /20 belonging to a colo/VPS/VM hosting ISP, it's worthless bringing up a new VM with the same host. Repeat 30 times, you've run out of hosting companies to work with.
You might also enjoy this: http://imatix-legacy.github.io/ :-)
If you want to get really expansive, you could read both World Wars as part of a longer-term (running from around 1815 to today) working-out of what used to be called "the German question" -- what role Germany would play on the European and global stages.

I elaborated on this idea a bit in another comment here: https://news.ycombinator.com/item?id=10549103
Because when a company sells millions of things to people, those people are potentially affected. Giving the company -- even one you have no particular love for -- a chance to figure out how to mitigate risk for their customers is a nice thing you do for their customers.
Can you describe a security setting where 97% accuracy is actually useful? Unless the events you're looking at are low volume or you somehow have much more malicious data than everyone else that seems like a recipe for your results being primarily FPs.
Wake | San Francisco, CA | Full Stack | Full Time (onsite)

https://wake.com/jobs

We're looking for a software engineer who will be an integral part of improving the way companies design, communicate and build products. You will work closely with designers to invent and build new ways for people to share ideas with each other. You will also be responsible for ensuring that the service remains incredibly fast and reliable as we continue to grow.
> The sale of these boats at profits creates wealth for the owner AND the employees of the boat making company.

The boat is wealth. The person selling the boat gives some wealth away, in exchange of a monetary profit. That profit will enable him to buy wealth produced by some other person.

Let's make things clearly.

- There's the real economy. Here, work, capital, natural resources, etc are used to create wealth. People create their valuables and exchange them for things they value more, increasing the wealth of everybody.

- There's the nominal economy. Here money is invested in acquiring resources, that other people will spend money consuming.

In a simple theory, the real economy works alone and money is irrelevant. But that theory seems to be wrong. In fact, people gladly raise prices, but resist lowering them. That creates an asymmetry and the consequence is that the real economy works well¹ when the amount of circulating money is constant or increasing, but does not work well when it is reducing.

Now, finally, people getting loans makes the amount of circulating money to increase, and paying them back makes it reduce.

1 - At least according to the mainstream theories. Also, only up to a certain point.
What comes next for NASA after Juno? Not much
I imagine there are legal difficulties with being more transparent, but I will say Silent Circle's occasional failures to manage their canary well have made it an unreliable signal.
Yes, they can block it. Brazil did it, I found this explanation on how they did it (basically, DNS hijacking):

https://ooni.torproject.org/post/brazil-whatsapp-block/
I would laugh about it if I wouldn't have done the same stuff the first time I built something for other people. Do they have a completely new team at gtk dev?
When you strip out capitalization in my quote like that you completely change the meaning. The Culture is the name of a wide-ranging space-faring civilization in the series of novels by Iain M. Banks. That's what I was referring to. And yes, it's capitalized, same as e.g. "United States".
My niece lives in SF, and was assaulted by a homeless lady who knocked her to the ground while trying to steal her backpack. She called me in tears and told me that when it was happening, streams of people were walking by ignoring her, and one guy literally said to her as he walked by "Welcome to San Francisco."

How awful.
article gave me a whole new perspective on Papua New Guinea. what these women face is horrendous.
Did the Aca specifically forbid you from importing drugs?
Lenovo is not one team. People who write and test superfish are not the same who deal with firmware. They may not even know each other.
The private blockchains are generally using proof of stake protocols like Tendermint, or just classical byzantine fault tolerant protocols instead of proof of work. These protocols can be trusted if at least 2/3 of the participants can be trusted and there is no hashing involved at all.

They are generally replacing trusted third parties like clearinghouses. Instead of needing to trust (and pay for) a third party clearinghouse running a centralized db, these enterprises just need to trust that 1/3 of the participants in the consortium running the blockchain won't collude to attack the protocol. And even if there is an attack, there will be a big paper trail.

You may ask "why not just use a BFT database system with signed logs?" Well, this is what a blockchain basically is, wrapped in a package with a bunch of other stuff.
Concurrency Models
It could turn out that way. It could also turn out that the 10% are the programmers whom we all depend on to keep the machines running. They could end up being like priests, those that work the magic in the machines that mere average people aren't qualified to touch. And good luck if you anger them: who could be safe with an army of machines out to kill you?

So it could turn out that the only people who would "work" in such a society are those who aspire to rule over others. And since they would be dependent on no one else in society, what recourse would the rest of society have if the "priests" turned evil? Or what if the "priests" got tired of maintaining mundane machines that take care of "useless" people and decided to have their machines eliminate the rest of the population? Then they could have wide open spaces and peace and quiet, and they could all go live on a beach of their choosing while their machines grow food and deliver it to them.

I imagine these ideas have already been done in scifi novels...
Shenzhen: The Silicon Valley of Hardware
Just a possible alternative that people may have not initially paid enough attention to get the full gist of what was going on and could have thought she was trying to leave without paying or some such.

People are very much in their own world here compared to other places I have lives/traveled. I offer my seat to pregnant, older, disabled, injured, etc. people and notice that most people are too absorbed in their phones or conversations to even notice there is someone that needs a seat.
"City Workers Repair Earthquake Fault"

give em a bonus this year
#1 seems incredibly unlikely to happen, which is why it doesn't worry me. It would be very at odds with who is in power globally.
I think I understand it. The X.0 is basically the start of a new technology branch -- it's radically different than what came before which is why it's a new major release. And of course any new radically different piece of software will not be stable, so X.0 represents the most unstable version of this new technology and theoretically X.Y where Y is the latest point release is then likely the most bug free and stable.

Perhaps this makes more sense in a world where software never needs to be finished.
I'm sure some people did. Probably the same number of people who started using them because the canaries were there.

However, that doesn't mean users haven't changed their behaviour in response to warrant canaries.

It's just not a lot of people, and it isn't clear we want it to be that way either. We don't want there to be a disincentive for companies creating them.
This is an interesting topic, but the article isn't particularly good or informative. It doesn't do anything to explain the actual scientific importance of this, if there is even one, or if this was just a notable relic showing the real world results of known geological processes. The term "Holy Grail" also doesn't seem to apply to this at all. That term is usually reserved for something that is almost impossible to find, but would be incredibly valuable if it was discovered.
Your comment is orthogonal to the situation posed by the GP. And I would say that if you're an 18yo who's looking at child pornography you should not be around children, especially those to whom you have unfettered access to as a parent/guardian.

>When a 18 years person can be guilty of sex offending by having ex with his/her 17 old partner we have a problem

I'm not arguing that Romeo and Juliet laws are a bad thing (even though I think that some state's implementations are too generous -- Georgia's laws effectively mean you can be a college freshman sleeping with high school freshmen). But when you're in the position that you're an 18yo with nude pictures of a minor, you do effectively have child porn. You should know well enough by that point to delete it. You are an adult.

A non trivial number of these pictures do end up on the internet. Do you think that you should be a sex offender if as an 18yo you disseminate a picture of your 16yo partner?

Do you think we should have a separate tier of images that are by definition child porn, but because of who possesses them they are not considered to be child porn? This will assuredly help actual offenders avoid the consequences of their actions.
Acorns Is Hiring Developers in OC
Did I miss the part where seismologists told the city, "hey, if you ever want to 'fix' this part, could you let us know first so we can discuss options?" Because, though I didn't read every word in the article, it sounds to me like the scientists woke up one day to a fixed curb and then complained because the city didn't just osmotically know this "common knowledge".

As to the city getting around to fixing something that was known to be broken in the 70s, well, that kind of snark just writes itself.
> Most of the modern increase in life expectancy has come from clean water, plenty of nutritious food, and vaccines against childhood diseases.

All of which you need civilization to properly achieve, and which aren't available to purely hunter-gatherer societies.
Most instance types you can launch with ephemeral disk that is local SSD. All recent generation servers are like this. m3s, etc. You don't need to launch an i2. There are a lot, lot of problems with this article.
Breaking news: the five of the seven remaining GTK developers collectively committed suicide this morning. The remaining two were found clutching each other behind a dumpster muttering, "no more themes, no more themes, no more themes..."
Okay, so you're fighting half of the US Military. A civil war in the US isn't going to be against some mustache-twirling cartoon villain that everyone recognizes is the greater evil. It will be a complex conflict where the participants don't even agree on the facts behind things. Add to that the various identity groups who all vary widely in how much they trust the government...

Rather than Tiananmen square, we would get Syria.
Say BOA, Citi, Goldman Sachs etc want to create a settlement network on blockchain. By using a centralized service, it would result in them trusting a third party (which they currently do) but by using the blockchain, they don't have to rely upon each other, and they all take equal responsibility.

Any entity which can mount a 50% attack in a private permissioned blockchain, would be known to all participant. Average Joe isn't mounting such an attack, because his key doesn't really have write access to the blockchain, only read access.
Thanks I realised too late to edit the title.
If you seriously think that teenagers sexually assaulting or raping people (likely other teenagers/children) is 'sex' then you are part of the problem.
I'm referring more to Gen Y than Gen Z. I know "Millennials" often includes both depending on who you ask with Gen Y's typically using it to reference Gen Z's. (personal note: Gen X/Y/Z as naming scheme is silly IMO, but those are the terms)

I remember no such discussion about sexting ever occurring - and I've attended more schools in more states than a typical military brat.

I believe you that the current generation (referring to those who are currently 18 or younger) are educated on the subject or at least have school discussions around the subject. It's also entirely plausible I only attended prudish schools that wouldn't discuss such topics. :) Just stating that I had the complete opposite experience and in >14 different schools.

E:

I'm also not implying that the above accounts for most of the cases, just saying that some of the reasons for being "put on the list" are not satisfactory to my opinion and listed one such occurrence where I do not agree with it. With a few grey areas, I'm of the opinion that two consenting minors should be able to be sexual without fearing it could ruin their lives.
"Most jobs worth doing would gladly be done for free. If you look at a job and realize that no one would do it if they weren't paid a lot of money (or were desperately trying to stay off the street), you have to wonder if that job should be done at all."

Like garbage men? Or people who work in sewers? Or many of the "dirty jobs" out there? How many of those jobs are important to the function of our society and need to be done but would be grossly understaffed in no one "needed" to work? It is a great utopia to think about if you don't go too deep.
Ask HN: Any advice for switching from self-employment back to employee?
Throw-away account for confidentially. I've been self employed for about 15 years, and am contemplating a return to the workforce as an employee. While the relative freedom of self employment has been a net positive, and I've had steady work through that entire time, I'm in a different place than I was 15 years ago, with a family, a home, and additional responsibilities which make self employment more challenging.

I'm wondering if those that have made this switch back to being an employee of a larger organization after a period of self-employment have any advice. I'm finding it difficult to even compare self employment to an employee role when it comes to basics like salary requirements considering most jobs include a benefits package that don't always have direct corollaries in a self-employment scenario.

What's your best advice for how to approach this transition and evaluate whether it might be the right time to change?
GPUs have been the pain of my Linux existence, everything else is generic enough to work, but last time I tried Ubuntu the default settings manager crashed at the mere sight of my GPU and when I installed a differed WM either couldn't find the resolutions I wanted to run or they didn't stick around after booting. After messing around with some "xorg-edgers" drivers I ended up with machine which claimed it had no displays anywhere and I just gave up and installed Windows.

It always seems to be one thing or another. Either it's some program/service I use daily that doesn't work (or doesn't quite work as well as I know it can) or it's some strange issue with sound or most likely GPU
There is the possibility of calling a Constitutional Convention. But most people have the heebie-jeebies over that, as everything then comes up for grabs. Women's voting rights, separation of powers, two-term limit for presidents -- having a president at all. You name it.
I love pop culture Asian design aesthetics. They are so much more clean and bouncy feeling than western software. It using websites and apps more fun.
Reduce Microservices overhead using Kong and Rancher
But what was the cause of secession? Well, if you believe the various southern legislatures, the cause was the defense of the institution of slavery:

http://www.civilwar.org/education/history/primarysources/dec...
Show us a damn picture of it fixed! /OCD-Rage
Toolshed: Less Boiler-Plate