masterjack

> Do we know it was BTC that was purchased?

Yes. You can monitor the price and volume charts of BTC after a wild tether appears. For example: http://www.tetherreport.com

Not quite. One reason why many passive indices are market-cap weighted is so they do not have to regularly trade. Suppose a fund needs to be 1% AMZN. Now you fire up a hype train and the price of AMZN doubles. It now represents twice as much of the index, market-cap weighted, so the fund wants to be 2% into AMZN, but their stake has doubled with the price so there’s no trading needed! That said, you can generally pick up an extra point or two of returns by equally weighting and trading against the daily volatility, and some funds do this, but they cannot scale up to have as large capacity.

Unfortunately way more often than not attempted proofs of hard problems end up flawed, especially if there are certain warning signs: https://www.scottaaronson.com/blog/?p=304

That said, I’d be happy to go over this as an analytic number theorist rfurman@alumni.stanford.edu

Which 3? He didn’t start PayPal and didn’t start Tesla.

I think the point is that “falling 1 percent” has no real information content since it’s consistent with daily volatility. You can take such random volatility and try to form a narrative around it but it’s intellectually dishonest.

Reordering a divergent series can indeed give you any result you want. This is not reordering though, it’s called Cesàro summation. It won’t always get you an answer, but if it does then the answer is unique and reacts nicely to sums and products.

Talking about it as summation might be misleading since that’s one of those concrete terms that mathematicians like to redefine without anyone’s approval. Picture we have a library that includes many tricks and approaches for taking an infinite series as input and outputs a number. We know it works as expected on every convergent series. But we forgot to put in any preconditions and we’ve let people input things that are not convergent series. But whoa in many cases we are still getting a number out of it, and it’s always the same answer no matter what we do. Maybe that’s something worth studying?

Here you go: Bitcoin the Hard way http://www.righto.com/2014/02/bitcoins-hard-way-using-raw-bi...

This shows you how to do everything yourself from scratch. There’s no such tutorial for ethereum, unfortunately, and it might be too complex a protocol to allow that.

And if you go offline for a few hours, your peers can steal your balance (unless you entrust somebody else to monitor it for you, which has its own tradeoffs)

Actually that’s an example of a soft fork. When you change the rules to make them more restrictive (add limits, decrease block size, block addresses, etc) those running the old version will find the new blocks valid so will try to build on them and find their blocks to be rejected, but can keep running no problem and are incentivized to upgrade.

When you change the rules to be less restrictive (add operations, increase block size, etc) then any old version will reject the new blocks, so will keep running their own chain until they are upgraded, potentially forever if there’s demand.

Where did you get that address from? Only google maps seems to think that’s the address

That is actually fascinating. You could build a ledger on top of github, transactions are push requests,there’d be a centralized party approving valid push requests and merging forks, but following a standardized formula that anyone can check and audit. Token ingress and egress are potentially hard to do, but it would be a fun idea to develop.

Actually, these stocks are traded on both NYSE and NASDAQ (and 10 other exchanges, including IEX), but Reg NMS promises the customer to get the best price on any exchange

Same in the US with post-completion OPT letting you stay and work freely for three years (including the STEM extension)

“We hope that our decision to withdraw the Zika submission voluntarily is further evidence of our commitment to engage positively with the agency,” said Dave Wurtz, Theranos’s vice president of regulatory, quality and clinical affairs.

Which is an American philosophy. Most countries, including Canada, do not treat free speech quite as highly, but instead find it more important to control hate speech (eg: banning Money for Nothing, by Dire Straits)

I don't think anyone would call it trivial; it might be that the submitter erroneously translates elementary as trivial. Here elementary means that it doesn't use higher math (calculus, analysis, etc), it doesn't say anything about ease or complication, and indeed the elementary proof of the prime number theorem is hella complicated.

Minor nitpick, it took me way too long to figure out which UW this is.

Good point, that really is the key. However, itjust turns it into the almost equivalent problem of: why assume Gaussian error terms, and the rest of the article does a good job at motivating this.

How does your induction step begin if not "assume m/n squared to 2"

Oh awesome, let's see... how many atoms are there in the universe?

"The number of atoms in the entire observable universe is estimated to be within the range of 1078 to 1082."

Thank you Google! http://www.google.com/search?q=how+many+atoms+are+in+the+uni...]

In terms of what has measurable effects in the classroom there is a very rigorous study by Hattie: "A synthesis of over 800 meta analyses relating to achievement" In it, things like computer assisted learning, simulation and games, testing etc have a very low effect. Primary is things like feedback and other things that come down to the teacher. A partial list is contained here: https://www.det.nsw.edu.au/proflearn/docs/pdf/qt_hattie.pdf That said, a big theme for what works seems to be personalization, custom feedback, custom progress, and computers should be great for this. It'll still be hard to beat a great teacher: in grade 1 alone there are close to 20 different reading levels that each student needs to be supervised through on their own pace

It is even worse than that when negative results are not published. This is because a study can keep getting repeated by different parties until they get that p-value. In other words, if you never publish a negative or inconclusive result (or stop studying once a conclusive result is published) then given enough time you /will/ get a positive result for every single plausible hypothesis.

These are some great points about the challenges of going public, but I wonder how much of it is just a deliberate logical decision to reap the most benefits. There's an incredible amount of capital flowing around (to the extent that in many cases it doesn't seem to be the limiting factor as in classical economic theory. And remember when YC decided to decrease the investment for practicality reasons?) so why would you IPO as Facebook at 1B when you get both more attractive private offers and also you can get enough new investment until the IPO value is at 100B.

I was into HackerRank for a while (in a previous life I did a lot of TopCoder/CodeJam/ICPC/USACO/etc) but it just wasn't the same. Programming competitions have a long history and high standards, and there were just too many repeated failures on both the side of execution and problem selection. An objective function that immediately allows a trivial solution for record points. Lack of compiling with optimizations. Changing what libraries are allowed partway through (more accurately, some server instances allowed the library, but they all went away by the end). Too basic algorithms. That said, I did have a lot of fun, especially having free reign to use ML and NLP and math libraries. But even that just made me realize that ML competitions tend by nature to be less about the "Aha" moment then they are about getting all your ducks in a row and doing the appropriate due diligence, and I might as well spend that time consulting for hedge funds.

You can buy a replica of the original first edition Encyclopedia Brittanica, and it's full of interesting tidbits like how California is a "land in the West Indies. It is unknown whether it be an island or a peninsula."

It's also a great example of either optimism or poor planning at the start of a major project: the three volumes are N-Z, C-M, A-B. The first volume does however have very in depth sections on accounting and anatomy (not as different as you'd expect). They did lose steam by the end, all they have to say about women is "the female of man".

http://store.britannica.com/products/052700000