For a rational matrix function Φ with poles outside the unit circle, we estimate the degree of the unique superoptimal approximation 𝒜Φ by matrix functions analytic in the unit disk. We obtain sharp ...

Divorce rarely emerges from a single event. It is more often the consequence of misaligned internal compasses. Here's what ...

Are attention spans really shrinking to just eight seconds? New research shows attention is more complex, involving different brain systems.

Hate has a way of generalizing. It grows from hating one person to hating others who remind you of that person and eventually to groups of people who remind you of that person.

Explore why the Efficient Market Hypothesis is flawed and what active manager underperformance really reveals.

Jonathan Rauch on the “constitution of knowledge,” disinformation’s dangers, and why reality always wins. Plus: What a J. D.

"It must be good-looking, easy to drive, and smart" ...

What would a socialist economy look like? The answers to this question vary, but most of them involve planning. A capitalist ...

The National Library has now decided that the gender critical book, The Women Who Wouldn’t Wheesht, should be included in its ...

Exponential growth is a pattern of data that shows greater increases with passing time, creating the curve of an exponential function.

We are regularly bombarded with information about a steep drop in attention spans. Based on its own data in 2015, Microsoft reported that the average attention span had dropped from about 12 seconds ...

The tragic school shooting in Minneapolis leaves us with three lessons that we may not want to hear—but which are worth ...