How many 2 D space-filling curves are there?

How many 2 D space-filling curves are there?

Segment Types A space-filling curve consists of a set of segments. Each segment connects two consecutive multi‐dimensional points. Five different types of segments are distinguished, namely, Jump, Contiguity, Reverse, Forward, and Still.

What is meant by a space-filling curve?

In mathematical analysis, a space-filling curve is a curve whose range contains the entire 2-dimensional unit square (or more generally an n-dimensional unit hypercube).

Which curve is known as space-filling curve?

The Hilbert curve (also known as the Hilbert space-filling curve) is a continuous fractal space-filling curve first described by the German mathematician David Hilbert in 1891, as a variant of the space-filling Peano curves discovered by Giuseppe Peano in 1890.

Are space-filling curves continuous?

The line and the plane are not topologically equivalent, but a space-filling curve is a continuous function that takes a line to a plane.

How does the Hilbert curve work?

The Hilbert curve is a space filling curve that visits every point in a square grid with a size of 2×2, 4×4, 8×8, 16×16, or any other power of 2. The Hilbert curve is also a special version of a quadtree; any image processing function that benefits from the use of quadtrees may also use a Hilbert curve.

Is Hilbert curve finite?

Although a finite approximation to the Hilbert curve is shown in the background, the positions within the square are those along the completed, infinite curve. The inverse mapping is not unique: Points in the square map back to multiple points in the interval.

What is the definition of a space filling curve?

In mathematical analysis, a space-filling curve is a curve whose range contains the entire 2-dimensional unit square (or more generally an n-dimensional unit hypercube).

Can a non-intersecting curve fill the unit square?

A non-self-intersecting continuous curve cannot fill the unit square because that will make the curve a homeomorphism from the unit interval onto the unit square (any continuous bijection from a compact space onto a Hausdorff space is a homeomorphism).

Who was the first person to discover a space filling curve?

Because Giuseppe Peano (1858–1932) was the first to discover one, space-filling curves in the 2-dimensional plane are sometimes called Peano curves, but that phrase also refers to the Peano curve, the specific example of a space-filling curve found by Peano.

How are space filling models used in chemistry?

Space-filling model. They are useful for visualizing the effective shape and relative dimensions of the molecule, and the shapes of surface a given static conformer might present. On the other hand, these models mask the chemical bonds between the atoms, and make it difficult to see the structure of the molecule that is obscured by…