Ciro Santilli @cirosantilli 37

The actually had decimal time systems... why that didn't win!

17 of them.

The best one is OurBigBook CLI of course! :-)

White papers are a form of advertisement. They are not peer reviewed papers and are generally not reproducible; their value lies entirely in trust of their publisher rather than being able to verify their claims.

This being a class is bullshit because it is not a clade, notably birds are not considered reptiles, but they are clearly in the clade.

We map each point and a small enough neighbourhood of it to ${\mathbb{R}}^n$, so we can talk about the manifold points in terms of coordinates.

Does not require any further structure besides a consistent topological map. Notably, does not require metric nor an addition operation to make a vector space.

Manifolds are cool. Especially differentiable manifolds which we can do calculus on.

A notable example of a Non-Euclidean geometry manifold is the space of generalized coordinates of a Lagrangian. For example, in a problem such as the double pendulum, some of those generalized coordinates could be angles, which wrap around and thus are not euclidean.