Viewing profile — evanpw

Yes, "same shape" in this context means "isometric". Rotations and reflections are considered differences in the way the shape is placed into the plane, not differences in the shap…

The same feed that publishes trades also publishes trade busts, so it's up to whoever's consuming it downstream to take care of.

The trades were not annulled, because NYSE ruled them not "clearly erroneous". Which is why it is was an existential mistake, not just an embarrassing one.

I had the same question while reading. It's probably obvious to the startup crowd, which is why it wasn't made explicit, but I think the trick is this: a company which will never m…

This is true of almost everything in math. You learn some definitions and techniques in one class, and it doesn't all become clear what's going on until you've used those to as the…

> Headlines about Supreme Court cases are almost uniformly misleading, because they suggest the Court is making decisions on policy issues rather than legal issues. I agree with th…

That's not it at all. All parties agreed that Congress passed a law allowing the EPA to regular carbon emissions by setting emission limits on different types of power plants based…

A finance billionaire with a background in math and physics (Jim Simons)

If you're talking about the FDIC, that protects you only in the case that the bank fails. It doesn't have anything to do with fraud against you in particular.

A company being fined for failing to surveil employees' personal email and text messages would get very different comments here if it wasn't a bank.

That's exactly what they did. The article says $172m disgorgement (how much the CFTC thinks they profited from this), $311m restitution (the amount the CFTC thinks JPM harmed other…

Another insane fact: in the US, circumcisions are usually done by obstetricians. Doctors who are trained on and work on exclusively women, except for a single surgical procedure on…

Medallion distributes their earnings and stays a fixed size rather than compounding, so it's a category error to compare their returns to most hedge funds. (At 66% return for 30 ye…

The difficulty is set so that almost all students can succeed, so this doesn't contradict anything the parent post said.

Pandas is still numpy under the hood, but you can create a numpy array that points to memory that was allocated elsewhere, so conversion to pandas can be done without copies in nic…

On Tuesday, GME traded more volume than any other stock, and that's on a day when the total market volume was much higher than usual (Wednesday is now the all-time record for share…

"An Introduction to Statistical Learning" was written by two of the same authors, and is explicitly meant to be a lower-level introduction to the same ideas: https://statlearning.c…

Also highly recommend his book "Topology from the Differentiable Viewpoint". Or any of his books for that matter; he's a famously good mathematical writer.

Unix philosophy meaning tools that do one thing

I fear the alternative would be all the good names becoming heavily overloaded: https://en.wikipedia.org/wiki/Normal .

I think the duplicates are in the coordinate dimension, like x[1] having more than one value, rather than x[1] and x[2] have the same value.

Here's a long data analysis making that argument: https://randomcriticalanalysis.com/why-conventional-wisdom-o... .