Using the period as a decimal separator rather than the comma

This is not the price to access a paper. This is the price to publish one paper.

It really depends on the country. France and Belgium, as you wrote. Germany, they expect a tip and look at you angry if you don't. Italy, they add a service charge at the end that is nowhete advertised. Turkey, they invent a random price at the end, complaints only taken if you're local. (I'm slightly exaggerating)

You want an answer?

So you've probably learned that if u is an eigenvector, then multiplying u by any scalar gives you another eigenvector with the same eigenvalue. That means that the set of all a*u where a is any scalar forms a 1-dimensional space (a line if this is a real vector space). This is an eigenspace of dimension one. The full definition of an eigenspace is as the set of all eigenvectors of a given eigenvalue. Now, if an eigenvalue has multiple independent eigenvectors, then the set of all eigenvectors for that eigenvalue is is still a linear space, but of dimension more than one. So for a real vector space, if an eigenvalue has two sets of independent eigenvectors, its eigenspace will be a 2-dimensional plane.

That's pretty much it.

There are many decades between use of this font and the Bundesrepublik Deutschland. This post is a typographical disaster.

No, we have an Emacs mode for this

The unicode "three dots" character is making me irrationally angry. In the terminal, just use three dots!

So badass that google puts all words in uppercase

Speak for yourself, beginner

Linux: Of course you can use these syscalls designed in the 70s. Windows: Compatibility with what? No, you must use these newly-designed functions that exist only on windows. It's for your own protection.

Tell me again how proprietary software gives a shit about compatibility.

Does Wikipedia count? Then Wikipedia.