Tag Archives: long reads

The Wild Prologue

Semigroups are like groups but semigroup elements don’t always have inverses, necessarily. Semigroups obey the associative law: a then b, then c       =       b then c, after a. but not necessarily the commutative law (3+14=14+3). Aristotle observed … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , | Leave a comment

Utopia. Class struggle. Liberty. Tyranny. Property. Natural law. Human rights. Rousseau, Locke, Paine, Plato, Spinoza, The Federalist Papers, Marx, Rawles, and the rest. What is a “good” society and how can “we” make our society better? For me there was … Continue reading

Image | Posted on by | Tagged , , , , , , , , , , , , , , , | Leave a comment

Vector fields

Vector fields pervade. I think about them every time I throw a frisbee in wind. In a social context, I think about vectors of intent attached to people talking at a party — vectors of flirtation, vectors of eye movement … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , | Leave a comment

Radiolab got it wrong

Link | Posted on by | Tagged , , , , , , , , , , , | Leave a comment

Do-It-Yourself MFE

or, The Reading List That Will Make You Rich. What follows is very much a field report of one particular DIY Masters in Financial Engineering. That brings drawbacks (like idiosyncrasy and personal narrative) — and advantages (I’ve actually read the … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , , , , , , , , | Leave a comment

Circles

A circle is made up of points equidistant from the center. But what does “equidistant” mean? Measuring distance implies a value judgment — for example, that moving to the left is just the same as moving to the right, moving forward … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , , , , , , , , , , | Leave a comment

Half a Year of Blogging

I’ve been writing for half a year now. It’s been an instructive and fulfilling experience. I’m a little better than I was in June. Writing is hard. Not being pedantic writing about math is hard. Concision is hard. Here are … Continue reading

Posted in Uncategorized | Tagged , , , , , , | Leave a comment

Well, I didn’t think this book was that funny. It was interesting to peep inside Salomon Smith Barney as bond trading was becoming lucrative. John Gutfreund was the first of many to take his firm public to the dismay of the … Continue reading

Image | Posted on by | Tagged , , , , , , , , , , , , , , | Leave a comment

So is it going to happen again? Another crippling financial maelstrom, I mean. I guess we haven’t yet reached the period of complacency that was said would follow the “subprime crisis” or the “financial mess” or whatever you want to … Continue reading

Image | Posted on by | Tagged , , , , , , , , , , , , , , , , | Leave a comment

Volatility Volatility, in finance, refers to the wiggliness of the time series. You observe the price of a security go up and down over time. If it changes a lot, that’s high vol: unstable, unpredictable. If it changes only a … Continue reading

Image | Posted on by | Tagged , , , , , , , , , , , , , , , , , , | Leave a comment